Mathew S. Isho, MD
NPI 1841235645ActiveIndividual· Colon & Rectal Surgery· San Diego, CA
Colon & Rectal Surgery (MD) with On Call Specialists Medical Group of San Diego Inc, practicing in San Diego, California. In 2024 Medicare paid $111,057 for 328 patients, and Part D covered 344 of their prescriptions, 72% of them generic. Biotissue Holdings Inc. was the largest of 3 companies reporting payments in 2025, $83.89 in all, mostly food and beverage. Lists Scripps Mercy Hospital and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1841235645 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Jun 17, 2006 |
| Last updated in NPPES | Jun 12, 2020 |
| Certified by provider | Jun 12, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Colon & Rectal Surgery Primary | 208C00000X | A93470 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - General Surgery (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 328 |
|---|---|
| Services billed | 738 across 59 procedure codes |
| Paid by Medicare | $111,057 |
Part D prescriptions in 2024
| Prescriptions (claims) | 344 · 351 30-day fills |
|---|---|
| Patients | 200 |
| Total drug cost | $20,697 |
| Generic share | 72% of claims |
Education and affiliations
| Graduation year | 1994 |
|---|---|
| Medicare specialty | General Surgery |
| Secondary specialties | Colorectal Surgery (Proctology) |
| Telehealth | Offers telehealth |
Medical group
- On Call Specialists Medical Group of San Diego IncSan Diego, CA · 144 clinicians
Hospital affiliations
- Scripps Mercy HospitalSan Diego, CA
- Sharp Coronado Hospital and Hlthcr CtrCoronado, CA
- Sharp Memorial HospitalSan Diego, CA
Industry payments (Open Payments)
- 2025$83.89 · 4 payments from 3 companies
- 2024$6,616 · 14 payments from 6 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biotissue Holdings Inc. | $41.81 | 2 |
| Davol Inc. | $27.30 | 1 |
| Conmed Corporation | $14.78 | 1 |
What the 2025 payments were for
- Food and Beverage$83.89 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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