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 2026Q3-Jul. 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
Questions about H0035
What is HCPCS code H0035?
H0035 is a HCPCS Level II code for mental health partial hospitalization, treatment, less than 24 hours. It sits in the Behavioral Health and Substance Abuse Treatment section.
Does Medicare cover H0035?
The CMS HCPCS file marks H0035 as "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.
How is H0035 paid under the physician fee schedule?
H0035 carries PFS status code I. Not valid for Medicare purposes. Medicare uses another code.