H0035: Mental health partial hospitalization, treatment, less than 24 hours
H0035 is a HCPCS Level II code for mental health partial hospitalization, treatment, less than 24 hours. It belongs to the Behavioral Health and Substance Abuse Treatment section. Medicare does not pay it: see the coverage note below before you bill it.
Medicare coverage: Not payable by Medicare
Medicare does not pay this code. It may still be valid for another payer, but a Medicare claim carrying it will not be reimbursed.
From the coverage field of the CMS Alpha-Numeric HCPCS File, release 2026Q4-Oct. This states Medicare’s position on the code, not on your particular claim.
Physician fee schedule statusI
Not valid for Medicare purposes. Medicare uses another code.
Global period: XXX
Want the dollar amount for your locality? The fee calculator applies your GPCI and the current conversion factor.
The CMS record for H0035
- Long descriptor
- Mental health partial hospitalization, treatment, less than 24 hours
- Short descriptor
- Mh partial hosp tx under 24h
- Added
- January 1, 2003
- BETOS
- Z2
- Pricing indicator
- 00: Not priced by Part B
The official wording. This is what the code means.
CMS's 28-character form, which is what shows up on a remittance advice.
When CMS introduced the code.
Berenson-Eggers Type of Service: CMS's own analytic grouping.
Service not separately priced by Part B, not covered, bundled into another service, or used by Part A only.
Codes adjacent to H0035
HCPCS has no hierarchy: related items simply sit next to each other in the numbering. If H0035 is not quite right, the correct code is very often within a few positions of it.
- H0027Alcohol and/or drug prevention environmental service (broad range of external activities geared toward modifying systems in order to mainstream prevention through policy and law)
- H0028Alcohol and/or drug prevention problem identification and referral service (e.g., student assistance and employee assistance programs), does not include assessment
- H0029Alcohol and/or drug prevention alternatives service (services for populations that exclude alcohol and other drug use e.g., alcohol free social events)
- H0030Behavioral health hotline service
- H0031Mental health assessment, by non-physician
- H0032Mental health service plan development by non-physician
- H0033Oral medication administration, direct observation
- H0034Medication training and support, per 15 minutes
- H0036Community psychiatric supportive treatment, face-to-face, per 15 minutes
- H0037Community psychiatric supportive treatment program, per diem
- H0038Self-help/peer services, per 15 minutes
- H0039Assertive community treatment, face-to-face, per 15 minutes
- H0040Assertive community treatment program, per diem
- H0041Foster care, child, non-therapeutic, per diem
- H0042Foster care, child, non-therapeutic, per month
- H0043Supported housing, per diem