Spencer Haller, M.D.
NPI 1679787535 · Internal Medicine Physician · Wilbraham, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Spencer Haller, M.D. is a Internal Medicine Physician provider in Wilbraham, MA (NPI 1679787535).
Provider details
- NPI number
- 1679787535
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 222039 (MA)
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
1,176 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 | 493 | $129 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 356 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 167 | $92 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 48 | $131 |
| Physician Or Allowed Practitioner Certification for Medicare-Covered Home Health Services Under a Home Health Plan of Care (patient Not Present), Including Contacts With Home Health Agency and Review of Reports of Patient Status Required By Physicians andG0180 | 37 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 119 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 613 | 174 |
| Amlodipine Besylate | 535 | 146 |
| Omeprazole | 339 | 82 |
| Losartan Potassium | 292 | 80 |
| Levothyroxine Sodium | 218 | 54 |
| Valsartan | 177 | 51 |
| Lisinopril | 172 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-05-10
- Last updated
- 2011-03-17
Frequently asked questions
- What is Spencer Haller's NPI number?
- Spencer Haller's National Provider Identifier (NPI) is 1679787535, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Spencer Haller's specialty?
- Spencer Haller is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Spencer Haller located?
- Spencer Haller's practice location on file with NPPES is 70 Post Office Park, Wilbraham, MA 01095-1290.
- What is Spencer Haller's phone number?
- The practice phone number listed in the NPPES registry for Spencer Haller is (413) 598-7770.
- Does Spencer Haller accept Medicare?
- Spencer Haller is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Spencer Haller's NPI active?
- Yes — Spencer Haller's NPI (1679787535) is active in the NPPES registry as of the last update on 2011-03-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.