Coding & Billing

SDOH Z codes: Z55–Z65 in ICD-10-CM

~10 min readBy Pelica Health teamPublished August 28, 2026Updated August 28, 2026Reviewed by Catherine Zhao

Short answer

SDOH Z codes are the ICD-10-CM codes in Z55 through Z65 for social conditions that affect health: housing, food, transportation, literacy, employment, family circumstances. FY2026 has 117 billable codes across ten categories, and any clinician involved in the patient's care can supply the documentation, including social workers, case managers and nurses. None of them raises a risk score, because not one appears in the CMS-HCC, RxHCC or ESRD mappings. What they do is identify a positive social need for the HEDIS SNS-E intervention rates, support community health integration and principal illness navigation billing, and tell a plan where to route a referral.

What SDOH Z codes are

SDOH Z codes are the ICD-10-CM diagnosis codes for social conditions that affect a patient's health but are not themselves medical diagnoses. Homelessness, food insecurity, transportation problems, illiteracy, unemployment. They live in Chapter 21 of ICD-10-CM under the heading "Persons with potential health hazards related to socioeconomic and psychosocial circumstances."

CMS and the ICD-10-CM Official Guidelines both describe the set as Z55 through Z65. There are 117 billable codes across ten categories in FY2026, and the FY2027 update adds none and changes none.

One quirk in the range: Z61 has no codes in ICD-10-CM. The WHO version of ICD-10 uses Z61 for negative life events in childhood, but ICD-10-CM classifies those under Z62.81-. That is why the official CMS list skips from Z60 to Z62.

117

Billable codes across Z55–Z65 in FY2026. Unchanged for FY2027.

Of those 117 that map to a CMS-HCC, RxHCC or ESRD category in the 2027 model mappings.

1.59%

Share of Medicare fee-for-service beneficiaries with any Z code claim in 2019, per CMS.

The Z55–Z65 categories

Code counts below are from the FY2026 ICD-10-CM code descriptions file.

Category	Title	Codes	Examples
Z55	Problems related to education and literacy	9	Z55.0 Illiteracy and low-level literacy; Z55.5 Less than a high school diploma; Z55.6 Problems related to health literacy
Z56	Problems related to employment and unemployment	11	Z56.0 Unemployment, unspecified; Z56.2 Threat of job loss; Z56.82 Military deployment status
Z57	Occupational exposure to risk factors	11	Z57.0 Occupational exposure to noise; Z57.31 Occupational exposure to environmental tobacco smoke
Z58	Problems related to physical environment	3	Z58.6 Inadequate drinking-water supply; Z58.81 Basic services unavailable in physical environment
Z59	Problems related to housing and economic circumstances	25	Z59.00–Z59.02 Homelessness, sheltered and unsheltered; Z59.41 Food insecurity; Z59.82 Transportation insecurity; Z59.811 Housing instability, housed, with risk of homelessness
Z60	Problems related to social environment	7	Z60.2 Problems related to living alone; Z60.4 Social exclusion and rejection; Z60.5 Target of (perceived) adverse discrimination and persecution
Z62	Problems related to upbringing	28	Z62.21 Child in welfare custody; Z62.812 Personal history of neglect in childhood
Z63	Other problems related to primary support group, including family circumstances	12	Z63.0 Problems in relationship with spouse or partner; Z63.4 Disappearance and death of family member; Z63.6 Dependent relative needing care at home
Z64	Problems related to certain psychosocial circumstances	3	Z64.0 Problems related to unwanted pregnancy; Z64.4 Discord with counselors
Z65	Problems related to other psychosocial circumstances	8	Z65.1 Imprisonment and other incarceration; Z65.4 Victim of crime and terrorism; Z65.5 Exposure to disaster, war and other hostilities

Z59 is where most of the operational value sits. Food insecurity, transportation insecurity, homelessness, housing instability, utility hardship and low income all live there, and those are the needs a health plan can actually route to a service.

Who can document them

This is the rule most teams get wrong, and it is unusually permissive. The ICD-10-CM Official Guidelines state that for the codes in Z55–Z65, "code assignment may be based on medical record documentation from clinicians involved in the care of the patient who are not the patient's provider since this information represents social information, rather than medical diagnoses."

The guidelines then name who counts: social workers, community health workers, case managers, and nurses, as long as the documentation is in the official medical record. CMS says the same thing in its Z code guidance, adding patient navigators to the list and noting that any member of the care team can collect the data during any encounter.

Patient self-report also works, with one condition. Self-reported information may support a Z code as long as a clinician or provider signs off on it and incorporates it into the record.

There is a documentation bar underneath all of this. The guidelines use living alone as the example: a patient who lives alone and suffers an injury that temporarily limits their activities of daily living supports Z60.2, but merely living alone, with no documented risk or unmet need, does not.

Why they do not risk-adjust

SDOH Z codes carry no RAF weight. Not one of the 117 codes in Z55–Z65 appears in the CMS 2027 Initial ICD-10-CM Mappings, which is the file that assigns diagnoses to CMS-HCC V22 and V28, RxHCC V08, and the ESRD models. A member coded with Z59.41 for food insecurity and nothing else has a risk score built from demographics alone.

Be precise about it, though, because coders repeat the blanket version and the blanket version is wrong. Ninety Z codes do map to an HCC: Z21 for asymptomatic HIV status, the Z43 series for ostomy and tracheostomy attention, ventilator dependence. Social Z codes carry no weight. A good number of the other Z codes do.

The reason is structural. The CMS-HCC model predicts next-year medical spending from clinical conditions, and CMS has never added social circumstances to it. Documenting homelessness has never raised a payment rate.

What they do enable

Three things, and one of them changed on January 1, 2026.

HEDIS SNS-E intervention rates

Social Need Screening and Intervention (SNS-E) is NCQA's ECDS measure for unmet food, housing and transportation needs. It has two halves: the share of members screened with a prespecified instrument, and the share with a positive screen who received a corresponding intervention within 30 days. For MY2026, NCQA added ICD-10-CM diagnosis codes to the intervention denominators to identify members with a positive need.

Note what that does and does not do. NCQA is explicit: "ICD-10 Z codes are used only to identify individuals with social needs who need a corresponding intervention... they don't imply administration of a standardized SDOH screening, and therefore cannot be used to report screening indicators." A Z code does not count as a screening. Only members already in the screening numerator get pulled into the intervention rates.

Community health integration and principal illness navigation

G0019 and G0022 pay for community health integration: 60 minutes a month of work by a certified or trained auxiliary worker, including a community health worker, addressing SDOH needs that are limiting the ability to diagnose or treat a problem raised at an initiating visit. G0023 and G0024 do the same for principal illness navigation. The 2026 national non-facility rates are about $86 for G0019 and $87 for G0023, with roughly $54 for each additional 30 minutes. NCQA added both families to the SNS-E allowable interventions for MY2026.

G0136, which is no longer an SDOH code

Through 2025, G0136 was the SDOH risk assessment: a standardized, evidence-based assessment of social determinants, 5 to 15 minutes, once every six months. CMS proposed deleting it for CY2026. After public comment it kept the code and replaced "social determinants of health" with "physical activity and nutrition" in the descriptor. As of January 1, 2026, G0136 reads "Administration of a standardized, evidence-based assessment of physical activity and nutrition, 5–15 minutes, not more often than every 6 months."

There is no longer a standalone SDOH risk assessment code under the Physician Fee Schedule. NCQA's SNS-E guidance, published in 2025, still cites G0136 with its old SDOH descriptor as the code for provider assessment in the screening numerator. Anyone building an SNS-E workflow on that code should check the current NCQA technical update before assuming the two documents agree.

What plans can and cannot do with them

Medicare Advantage plans adjust Star Ratings for social risk through the Categorical Adjustment Index, which is calculated from the share of enrollees who are dually eligible, who receive the Part D low-income subsidy, or who have disability status. Those flags come from CMS enrollment data. No Z code feeds the CAI.

What Z codes give a plan is population intelligence and routing. CMS frames the use cases as identifying social risk factors, informing follow-up and discharge planning, triggering referrals to social services, and tracking those referrals between providers and community organizations. Some state Medicaid programs and value-based contracts do attach payment to Z code capture, so check the contract before concluding there is no financial upside.

Volume is the constraint. CMS's most recent published analysis found that 1.59% of continuously enrolled Medicare fee-for-service beneficiaries had a claim with any Z code in 2019, up from 1.31% in 2016. The five most-used codes were homelessness, death of a family member, living alone, living in a residential institution, and problems with a spouse or partner. A denominator that thin will not support population analytics on its own.

Common mistakes

What goes wrong	Why it matters
Waiting for the physician to document the social need	The guidelines allow social workers, community health workers, case managers and nurses to supply the documentation
Coding a circumstance with no documented risk or unmet need	Living alone, by itself, is not codeable. The record has to show the risk or the need
Using self-reported screening answers without a sign-off	Self-report supports a Z code only when a clinician or provider signs off and incorporates it into the record
Expecting a RAF lift from Z code capture	None of the 117 SDOH Z codes maps to a CMS-HCC, RxHCC or ESRD category
Counting a Z code as an SNS-E screening	NCQA uses Z codes only to identify a positive need for the intervention denominators
Assuming Z codes never risk-adjust	90 other Z codes do, including Z21 for HIV status and the Z43 ostomy series
Treating G0136 as the SDOH assessment code in 2026	The descriptor changed to physical activity and nutrition effective January 1, 2026
Coding only Z59.00 unspecified homelessness	Z59.01 sheltered and Z59.02 unsheltered exist and tell a referral team something different

How Pelica handles SDOH data

Care coordinators learn most of this on phone calls. The member lost their ride to dialysis, the daughter who used to bring groceries moved away. The field where that would be useful sits in a billing system nobody on the call touches, so the fact expires in a call note.

Pelica keeps one live member record built from claims, EHR, pharmacy, lab and ADT feeds, and the Care Management copilot writes what it learns during outreach straight onto it. The social need shows up next to the open gaps and the upcoming appointments rather than in a call note that expires. When the need blocks a measure, the copilot routes the intervention and tracks whether it landed inside the 30-day window SNS-E requires. Customers close 70%+ of transitions-of-care gaps within 30 days of going live.

Related terms

Non-adherence ICD-10 codes covers the Z91.1- series, the other set of Z codes quality teams use and the one most often confused with these. HCC explains the model that these codes are absent from and why that matters. HEDIS measures covers the measure set SNS-E belongs to.

Sources

Frequently asked questions

Common questions about ICD-10-CM SDOH Z codes, who can document them, and what they are worth.

What are SDOH Z codes?

SDOH Z codes are ICD-10-CM diagnosis codes in the Z55 through Z65 range that describe social conditions affecting a patient's health rather than medical diagnoses: education and literacy problems, employment problems, occupational exposures, physical environment problems, housing and economic circumstances, social environment, upbringing, family circumstances, and psychosocial circumstances. There are 117 billable codes across ten categories in FY2026, and the FY2027 update leaves them unchanged.

Who can document an SDOH Z code?

Almost anyone on the care team. The ICD-10-CM Official Guidelines state that for codes in Z55 through Z65, code assignment may be based on documentation from clinicians involved in the patient's care who are not the patient's provider, because this is social information rather than a medical diagnosis. The guidelines name social workers, community health workers, case managers and nurses, as long as their documentation is in the official medical record. Patient self-reported information may also be used if a clinician or provider signs off on it and incorporates it into the record.

Do SDOH Z codes affect risk adjustment or RAF scores?

No. None of the 117 codes in Z55 through Z65 appears in the CMS 2027 Initial ICD-10-CM Mappings, which is the file assigning diagnoses to CMS-HCC V22 and V28, RxHCC V08 and the ESRD models. Coding food insecurity or homelessness adds nothing to a member's risk score. Other Z codes outside the SDOH range do risk-adjust, including Z21 for asymptomatic HIV status and the Z43 series for ostomy and tracheostomy attention, so the general claim that Z codes never risk-adjust is wrong.

Why is Z61 missing from the SDOH Z code range?

Z61 has no codes in ICD-10-CM. The WHO version of ICD-10 uses Z61 for problems related to negative life events in childhood, but ICD-10-CM classifies those under subcategory Z62.81-, personal history of abuse and neglect in childhood. That is why both the CMS Z code guidance and the ICD-10-CM Official Guidelines list Z60 followed by Z62 when they enumerate the SDOH categories.

Is G0136 still the SDOH risk assessment code in 2026?

No. CMS proposed deleting G0136 for CY2026, then kept the code and rewrote the descriptor. As of January 1, 2026 it reads: administration of a standardized, evidence-based assessment of physical activity and nutrition, 5 to 15 minutes, not more often than every 6 months. There is no longer a standalone SDOH risk assessment code under the Physician Fee Schedule. NCQA's 2025 SNS-E guidance still cites the old SDOH descriptor, so check the current technical update before building a workflow on it.

Do Z codes count toward the HEDIS SNS-E measure?

Only on the intervention side. NCQA added ICD-10-CM diagnosis codes to the SNS-E intervention denominators for MY2026 to identify members with a positive social need. NCQA states that Z codes do not imply administration of a standardized screening and therefore cannot be used to report the screening indicators. Only members already captured in a screening numerator are pulled into the intervention rates, so a Z code without a documented screening closes nothing.

What can a health plan actually do with SDOH Z code data?

Route and analyze, not get paid. CMS describes the use cases as identifying social risk factors, informing follow-up and discharge planning, triggering referrals to social services, and tracking those referrals between providers and community organizations. Star Ratings adjust for social risk through the Categorical Adjustment Index, which is built from dual eligibility, Part D low-income subsidy status and disability flags in CMS enrollment data rather than from Z codes. Some state Medicaid programs and value-based contracts do tie payment to Z code capture.

A social need learned on a phone call rarely reaches the claim.

Pelica writes what care coordinators learn during outreach onto one live member record, routes the intervention, and tracks whether it landed inside the 30-day window. Customers close 70%+ of transitions-of-care gaps within 30 days of going live.

Book a Demo → See the Care Management copilot