Harry B Matossian, M.D.
Harry B Matossian, M.D. is a healthcare organization registered as Ambulatory Surgical Clinic/Center in Ukiah, CA, holding Type 2 (organization) NPI 1851682850 since 2011. The authorized official on file is Shantil Ferguson, Financial/Billing Manager.
✓ Active NPI ✓ Valid NPI checksum
| NPI | 1851682850 |
|---|---|
| Entity type | Organization (Type 2) |
| Legal business name | Harry B Matossian, M.D. |
| Practice address | 234 HOSPITAL DR, Ukiah, CA, 95482 |
| Phone | 7074620681 |
| Enumeration date | 2011-04-25 |
| Last updated in NPPES | 2011-04-25 |
Authorized official
| Name | Shantil Ferguson |
|---|---|
| Title | Financial/Billing Manager |
| Phone | 7074620681 |
Taxonomy & classification
| Taxonomy code | Specialty | Primary | License | State |
|---|---|---|---|---|
| 261QA1903X | Ambulatory Surgical Clinic/Center | Primary | — | — |
Copy-ready billing details
Provider: Harry B Matossian, M.D. NPI: 1851682850 Taxonomy: 261QA1903X (Ambulatory Surgical Clinic/Center) Address: 234 HOSPITAL DR, Ukiah, CA, 95482
Providers at this address
| NPI | Name | Type | Specialty | Location |
|---|---|---|---|---|
| 1316945702 | Harry Matossian | Individual | Gastroenterology Physician | Ukiah, CA |
| 1003814229 | Harry B. Matossian | Organization | Ambulatory Surgical Clinic/Center | Ukiah, CA |
| 1649384751 | Brian Hauck | Individual | Gastroenterology Physician | Ukiah, CA |
| 1710071774 | Craig Aronchick | Individual | Gastroenterology Physician | Ukiah, CA |
| 1972673895 | Renee Vinyard | Individual | Physician Assistant | Ukiah, CA |
| 1164804761 | Adventist Health Physicians Network | Organization | Gastroenterology Physician | Ukiah, CA |
| 1174281281 | Stacie Bratcher | Individual | Family Nurse Practitioner | Ukiah, CA |
| 1316739501 | Bryce Irwin | Individual | Medical Physician Assistant | Ukiah, CA |
Verify this record
Cross-check NPI 1851682850 against the authoritative CMS record: view Harry B Matossian, M.D. on the official NPPES registry .
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes — even if the provider moves or changes specialty. Read the full guide or validate an NPI number.
Frequently asked questions
What is a Type 2 NPI?
What type of organization is Harry B Matossian, M.D.?
Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2011-04-25.