Jennifer Mammen, M.D.
NPI 1982742219 · Endocrinology, Diabetes & Metabolism Physician · Baltimore, MD
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Mammen, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Baltimore, MD (NPI 1982742219).
Provider details
- NPI number
- 1982742219
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- T3876 (MD)
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
342 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 | 103 | $98 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 59 | $135 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 55 | $131 |
| New Patient Office Or Other Outpatient Visit With Moderate Level of Medical Decision Making, If Using Time, 45 Minutes Or More99204 | 31 | $174 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes99222 | 27 | $126 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 8 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 201 | 59 |
| Methimazole | 114 | 37 |
| Levothyroxine Sodiumbrand: Synthroid | 92 | 19 |
| Hydrocortisone | 72 | 15 |
| Liothyronine Sodium | 42 | 15 |
| Desmopressin Acetate | 15 | — |
| Semaglutidebrand: Ozempic | 14 | — |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-02-01
- Last updated
- 2010-01-29
Frequently asked questions
- What is Jennifer Mammen's NPI number?
- Jennifer Mammen's National Provider Identifier (NPI) is 1982742219, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Mammen's specialty?
- Jennifer Mammen is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Jennifer Mammen located?
- Jennifer Mammen's practice location on file with NPPES is 1830 E Monument St, Baltimore, MD 21287-0020.
- What is Jennifer Mammen's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Mammen is (410) 955-3663.
- Does Jennifer Mammen accept Medicare?
- Jennifer Mammen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Mammen's NPI active?
- Yes — Jennifer Mammen's NPI (1982742219) is active in the NPPES registry as of the last update on 2010-01-29.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.