Doctor profile · Federal record
Dr. Stephan Grigorian, M.D.
Anatomic Pathology & Clinical Pathology Physician (CMS: Pathology) · Corona, CA
- NPI 1821129057
- Accepts Medicare
- 33 yrs in practice
- Male
- Solo practice
- No sanctions
Practice & contact
- Primary practice
-
800 S Main St
Corona, CA 928823420
(858) 877-0267 - Mailing address
-
Po Box 4544
Mission Viejo, CA 926904544
Credentials & registration
- NPI registered
- March 2007 — 19 yrs on file
- Profile last updated
- August 29, 2022
- Year of graduation
- 1993 — 33 yrs since
- Specialty taxonomy
- 207ZP0102X — NUCC code
- State license (1)
- California #A88170
Federal sanctions & exclusions
No sanctions, exclusions or revocations on file
Checked against OIG LEIE on NPI 1821129057. Last verified May 11, 2026.Medicare procedures · 2023
Top services delivered
Total services
1,881
Distinct HCPCS
10
Medicare allowed
$53,064
| HCPCS | Description | Services | Patients | Avg allowed | |
|---|---|---|---|---|---|
88305 |
Pathology examination of tissue using a microscope, intermediate complexity | 704 | 324 | $37 | |
88313 |
Special stained specimen slides to examine tissue including interpretation and report | 263 | 114 | $12 | |
88342 |
Special stained specimen slides to examine tissue, initial procedure | 203 | 145 | $35 | |
88341 |
Special stained specimen slides to examine tissue, each additional procedure | 165 | 46 | $28 | |
88311 |
Preparation of tissue for examination by removing any calcium present | 152 | 147 | $12 | |
88104 |
Cell examination of body fluid, smears | 114 | 74 | $27 | |
88304 |
Pathology examination of tissue using a microscope, moderately low complexity | 108 | 103 | $11 | |
88300 |
Pathology examination of tissue using a microscope, limited examination | 70 | 66 | $4 | |
88307 |
Pathology examination of tissue using a microscope, moderately high complexity | 42 | 34 | $83 | |
88360 |
Microscopic genetic analysis of tumor, manual | 21 | 14 | $42 |
In context: peer comparison
Among 3 peers in this city , average services per provider: 122. This provider delivers 15× the peer median.Hospital affiliations
Frequently asked questions
What is Dr. Stephan Grigorian's medical specialty?
Dr. Stephan Grigorian practices Anatomic Pathology & Clinical Pathology Physician in Corona, CA.
Where does Dr. Stephan Grigorian practice?
Dr. Stephan Grigorian practices at 800 S Main St, Corona, CA 928823420. Office phone: 8588770267.
What is Dr. Stephan Grigorian's NPI?
Dr. Stephan Grigorian's National Provider Identifier (NPI) is 1821129057, issued by NPPES.
Does Dr. Stephan Grigorian accept Medicare assignment?
Yes. Dr. Stephan Grigorian accepts Medicare assignment, meaning Medicare-allowed amounts are accepted as full payment for covered services.
What procedures does Dr. Stephan Grigorian commonly perform?
Top Medicare-reported procedures in 2023: Pathology examination of tissue using a microscope, intermediate complexity (HCPCS 88305); Special stained specimen slides to examine tissue including interpretation and report (HCPCS 88313); Special stained specimen slides to examine tissue, initial procedure (HCPCS 88342). Source: CMS Medicare Physician & Other Practitioners file.