Active NPI
Mark Hirschfield, MFT
- Marriage & Family Therapist
- San Francisco, CA
National Provider Identifier
1033451737
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Marriage & Family Therapist
- License
- MFC39550
- Practice address
- 1996 Union St
San Francisco, CA 94123-4230 - Phone
- (415) 922-4444
- Fax
- (415) 820-1545
- NPI assigned
- Mar 20, 2013
- Last updated
- Feb 2, 2026
- Sex
- Male
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Marriage & Family Therapist | 106H00000X | MFC39550 | CA | Primary |
Addresses
Primary practice location
1996 Union St
San Francisco, CA 94123-4230
Mailing address
999 Sutter St
San Francisco, CA 94109-6023
Phone (415) 922-4444
Medicare participation
Medicare enrollment files- Medicare fee-for-service enrollment
- Not listed in the public Medicare enrollment file
- Opted out of Medicare
- Yes, effective Jan 1, 2024 through Jan 1, 2028
National Provider Directory
National Provider Directory- Medicare enrollment (NPD)
- Not enrolled
State licenses
| License | State | Type | Specialty |
|---|---|---|---|
| MFC39550 | CA | MD | Marriage & Family Therapist |
| 39550 | CA | MD | Physical Therapist |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1363737600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1769990400000",
"number": "1033451737",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "999 SUTTER ST",
"city": "SAN FRANCISCO",
"state": "CA",
"postal_code": "941096023",
"telephone_number": "415-922-4444"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1996 UNION ST",
"city": "SAN FRANCISCO",
"state": "CA",
"postal_code": "941234230",
"telephone_number": "415-922-4444",
"fax_number": "415-820-1545"
}
],
"practiceLocations": [],
"basic": {
"last_name": "HIRSCHFIELD",
"first_name": "MARK",
"credential": "MFT",
"sole_proprietor": "YES",
"sex": "M",
"enumeration_date": "2013-03-20",
"last_updated": "2026-02-02",
"certification_date": "2026-02-02",
"status": "A"
},
"taxonomies": [
{
"code": "106H00000X",
"taxonomy_group": "",
"desc": "Marriage & Family Therapist",
"state": "CA",
"license": "MFC39550",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in San Francisco, CA
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 2, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
- Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Opt Out Affidavits.
- National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.