Nicholas Andreas Kolaitis, M.D.
NPI 1891060067ActiveIndividual· Internal Medicine, Pulmonary Disease· San Francisco, CA
Internal Medicine, Pulmonary Disease (M.D.) with University of California San Francisco and 2 other groups, practicing in San Francisco, California. Their prescriptions cost Medicare Part D more than their services did: $3,916,174 for 1,804 claims, against $70,976 paid for services in 2024. Merck Sharp & Dohme LLC was the largest of 7 companies reporting payments in 2025, $48,400 in all, mostly consulting fees. Lists Adventist Health Clearlake and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1891060067 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Mar 20, 2012 |
| Last updated in NPPES | May 10, 2017 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Pulmonary Disease Primary | 207RP1001X | A129772 | CA |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Pulmonary Disease (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 289 |
|---|---|
| Services billed | 937 across 24 procedure codes |
| Paid by Medicare | $70,976 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,804 · 2,745 30-day fills |
|---|---|
| Patients | 318 |
| Total drug cost | $3,916,174 |
| Generic share | 69% of claims |
Education and affiliations
| Graduation year | 2012 |
|---|---|
| Medicare specialty | Pulmonary Disease |
| Telehealth | Offers telehealth |
Medical groups
- University of California San FranciscoSan Francisco, CA · 1,839 clinicians
- UCSF Medical Group Business ServicesSan Francisco, CA · 1,598 clinicians
- Regents of the University of CaliforniaSan Francisco, CA · 732 clinicians
Hospital affiliations
- Adventist Health ClearlakeClearlake, CA
- Sutter Medical Center, SacramentoSacramento, CA
- UCSF Medical CenterSan Francisco, CA
Industry payments (Open Payments)
- 2025$48,400 · 85 payments from 7 companies
- 2024$43,731 · 61 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Merck Sharp & Dohme LLC | $27,642 | 46 |
| United Therapeutics Corporation | $10,354 | 21 |
| Chiesi USA, Inc. | $9,829 | 7 |
| Actelion Pharmaceuticals US, Inc. | $434.62 | 8 |
| Regeneron Healthcare Solutions, Inc. | $89.92 | 1 |
What the 2025 payments were for
- Consulting Fee$34,858 · 6 payments
- Travel and Lodging$9,906 · 22 payments
- Food and Beverage$3,637 · 57 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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