Andrew Walker, MD
NPI 1639198559 · Internal Medicine Physician · Camp Hill, PA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Andrew Walker, MD is a Internal Medicine Physician provider in Camp Hill, PA (NPI 1639198559).
Provider details
- NPI number
- 1639198559
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD056746L (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
19 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
131 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) |
|---|---|---|
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 76 | $122 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 55 | $86 |
Typical Medicare-allowed amounts for these services range $86–$122 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 9 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Azithromycin | 151 | 148 |
| Atovaquone/Proguanil Hclbrand: Atovaquone-Proguanil Hcl | 82 | 77 |
| Amoxicillin/Potassium Clavbrand: Amoxicillin-Clavulanate Potass | 32 | 32 |
| Doxycycline Hyclate | 19 | 19 |
| Methylprednisolone | 19 | 19 |
| Ibuprofen | 15 | 15 |
| Typhoid Vi Polysacch Vaccinebrand: Typhim Vi | 15 | 15 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-19
- Last updated
- 2020-08-11
- Certified
- 2020-08-11
Frequently asked questions
- What is Andrew Walker's NPI number?
- Andrew Walker's National Provider Identifier (NPI) is 1639198559, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Andrew Walker's specialty?
- Andrew Walker is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Andrew Walker located?
- Andrew Walker's practice location on file with NPPES is 431 N 21st St, Camp Hill, PA 17011-2202.
- What is Andrew Walker's phone number?
- The practice phone number listed in the NPPES registry for Andrew Walker is (717) 763-3730.
- Does Andrew Walker accept Medicare?
- Andrew Walker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Andrew Walker's NPI active?
- Yes — Andrew Walker's NPI (1639198559) is active in the NPPES registry as of the last update on 2020-08-11.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.