Carina Spencer, M.D.
NPI 1255642773 · Internal Medicine Physician · Boston, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Carina Spencer, M.D. is a Internal Medicine Physician provider in Boston, MA (NPI 1255642773).
Provider details
- NPI number
- 1255642773
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- L-244054 (MA)
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
15 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
818 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) |
|---|---|---|
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 199 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 189 | $140 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 116 | $141 |
| 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 | 90 | $17 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 72 | $196 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 35 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 228 | 95 |
| Levothyroxine Sodium | 127 | 41 |
| Omeprazole | 103 | 35 |
| Lisinopril | 97 | 40 |
| Losartan Potassium | 70 | 22 |
| Amlodipine Besylate | 68 | 26 |
| Rosuvastatin Calcium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-06-30
- Last updated
- 2018-11-14
Frequently asked questions
- What is Carina Spencer's NPI number?
- Carina Spencer's National Provider Identifier (NPI) is 1255642773, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Carina Spencer's specialty?
- Carina Spencer is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Carina Spencer located?
- Carina Spencer's practice location on file with NPPES is Massachusetts General Hospital, Boston, MA 02114.
- What is Carina Spencer's phone number?
- The practice phone number listed in the NPPES registry for Carina Spencer is (617) 726-2865.
- Does Carina Spencer accept Medicare?
- Carina Spencer is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Carina Spencer's NPI active?
- Yes — Carina Spencer's NPI (1255642773) is active in the NPPES registry as of the last update on 2018-11-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.