William Filer, M.D.
NPI 1780845792 · Physical Medicine & Rehabilitation Physician · Chapel Hill, NC
Enrolled with Medicare as Practitioner - Physical Medicine and Rehabilitation · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Filer, M.D. is a Physical Medicine & Rehabilitation Physician provider in Chapel Hill, NC (NPI 1780845792).
Provider details
- NPI number
- 1780845792
- Entity type
- Individual
- Primary specialty
- Physical Medicine & Rehabilitation PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 2011-01801 (NC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
610 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 372 | $73 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 71 | $110 |
| Hospital Discharge Day Management, 30 Minutes Or Less99238 | 35 | $76 |
| Injection of Chemical for Paralysis of Nerve Muscles on Arm Or Leg, 1-4 Muscles, Each Additional Extremity64643 | 31 | $86 |
| Needle Measurement of Electrical Activity in Muscle With Injection of Chemical for Paralysis of Nerve Muscle95874 | 31 | $66 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Baclofen | 54 | 15 |
| Gabapentin | 30 | — |
| Diazepam | 16 | — |
| Tizanidine Hcl | 16 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-23
- Last updated
- 2019-03-20
Frequently asked questions
- What is William Filer's NPI number?
- William Filer's National Provider Identifier (NPI) is 1780845792, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Filer's specialty?
- William Filer is listed in the NPPES registry with a primary specialty of Physical Medicine & Rehabilitation Physician (Allopathic & Osteopathic Physicians).
- Where is William Filer located?
- William Filer's practice location on file with NPPES is 101 Manning Dr, Chapel Hill, NC 27514-4220.
- What is William Filer's phone number?
- The practice phone number listed in the NPPES registry for William Filer is (919) 966-8812.
- Does William Filer accept Medicare?
- William Filer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Filer's NPI active?
- Yes — William Filer's NPI (1780845792) is active in the NPPES registry as of the last update on 2019-03-20.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.