Rainier Mark Enrique Guiang, M.D.
NPI 1548217821ActiveIndividual· Anesthesiology, Pain Medicine· Riverside, CA
Anesthesiology, Pain Medicine (M.D.) with University Pain Consultants Inc., practicing in Riverside, California. 316 Medicare patients in 2024, $180,057 paid; nearly all of their 3,172 Part D prescriptions were generic (97%). Biotronik Nro, Inc. was the largest of 2 companies reporting payments in 2025, $91.22 in all, mostly food and beverage.
Overview
| NPI | 1548217821 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 30, 2006 |
| Last updated in NPPES | May 14, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Anesthesiology, Pain Medicine Primary | 207LP2900X | A84296 | CA |
| Anesthesiology | 207L00000X | A84296 | 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 - Anesthesiology (CA) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 316 |
|---|---|
| Services billed | 4,659 across 25 procedure codes |
| Paid by Medicare | $180,057 |
Part D prescriptions in 2024
| Prescriptions (claims) | 3,172 · 3,354 30-day fills |
|---|---|
| Patients | 908 |
| Total drug cost | $89,555 |
| Generic share | 97% of claims |
Education and affiliations
| Graduation year | 1999 |
|---|---|
| Medicare specialty | Anesthesiology |
| Secondary specialties | Pain Management |
| Telehealth | Offers telehealth |
Medical group
- University Pain Consultants Inc.Corona, CA · 4 clinicians
Industry payments (Open Payments)
- 2025$91.22 · 2 payments from 2 companies
- 2024$381.23 · 11 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Biotronik Nro, Inc. | $63.14 | 1 |
| Abbott Laboratories | $28.08 | 1 |
What the 2025 payments were for
- Food and Beverage$91.22 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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