Stephanie Mascia, M.D., M.P.H
NPI 1922413582 · Internal Medicine Physician · Cambridge, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephanie Mascia, M.D., M.P.H is a Internal Medicine Physician provider in Cambridge, MA (NPI 1922413582).
Provider details
- NPI number
- 1922413582
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D., M.P.H
- Sex
- Female
- Sole proprietor
- Yes
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
12 yrs in NPPES registry
- Profile completeness28% of score
83% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
258 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 | 185 | $106 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 34 | $152 |
| Annual Alcohol Misuse Screening, 5 to 15 MinutesG0442 | 20 | $9 |
| Annual Depression Screening, 5 to 15 MinutesG0444 | 19 | $9 |
Typical Medicare-allowed amounts for these services range $9–$152 (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 · 31 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 171 | 66 |
| Amlodipine Besylate | 108 | 36 |
| Lisinopril | 98 | 30 |
| Levothyroxine Sodium | 79 | 28 |
| Hydrochlorothiazide | 55 | 24 |
| Lorazepam | 51 | 18 |
| Losartan Potassium | 46 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-06-23
- Last updated
- 2022-07-21
Frequently asked questions
- What is Stephanie Mascia's NPI number?
- Stephanie Mascia's National Provider Identifier (NPI) is 1922413582, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephanie Mascia's specialty?
- Stephanie Mascia is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Stephanie Mascia located?
- Stephanie Mascia's practice location on file with NPPES is 625 Mount Auburn St Ste 104, Cambridge, MA 02138-4518.
- What is Stephanie Mascia's phone number?
- The practice phone number listed in the NPPES registry for Stephanie Mascia is (617) 491-5586.
- Does Stephanie Mascia accept Medicare?
- Stephanie Mascia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephanie Mascia's NPI active?
- Yes — Stephanie Mascia's NPI (1922413582) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.