Quick answers
- Does Tammy L. Underwood accept Medicare assignment?
- Yes. Medicare's clinician data says Tammy L. Underwood accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does Tammy L. Underwood see?
- In 2024, CMS data shows 118 Original Medicare patients and 296 services for Tammy L. Underwood. This counts Original Medicare only and measures volume, not quality.
- What is Tammy L. Underwood's NPI number?
- 1902587405. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for Tammy L. Underwood, data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 118 |
|---|---|
| Services billed to Medicare | 296 |
| Different services or procedures | 39 |
| Participating Medicare provider | Yes |
| Average age of these patients | 72 |
Most frequent services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)107 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)46 services
- Annual depression screening, 5 to 15 minutes (G0444)21 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol71%
- Arthritis60%
- Ischemic heart disease39%
- Chronic kidney disease31%
- Diabetes25%
Hospitals where Tammy L. Underwood works
Medicare's Facility Affiliation Data lists Tammy L. Underwood at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- The Washington HospitalWashington, PA · Acute Care Hospital · Medicare rating: 4 of 5 stars · Emergency services: listed by Medicare · CCN 390042
Practice locations
Addresses where Tammy L. Underwood is enrolled with Medicare (CMS data updated October 2, 2026).
- 1263 Route 40 WClaysville, PA 15323 (724) 663‑7731
- 4000 Waterdam Plaza Dr, Suite 280Mc Murray, PA 15317 (724) 620‑0830
Group practices
Medicare enrollment lists Tammy L. Underwood as a member of this group (CMS data updated October 2, 2026).
- Preferred Primary Care Physicians, Inc.88 clinicians in the group
Specialties
- Nurse Practitionerprimary
Other nurse practitioners in Pennsylvania
Clinicians with the same Medicare primary specialty in Pennsylvania — not a recommendation.
Other clinicians in Preferred Primary Care Physicians, Inc.
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| School | Georgetown University School Of Medicine |
|---|---|
| Graduation year | 2023 |
| Gender (as listed) | Female |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| Telehealth | Offers telehealth services |
| NPI (National Provider Identifier) | 1902587405 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians