Joanna Klubo-Gwiezdzinska, MD, PHD
NPI 1912237058 · Endocrinology, Diabetes & Metabolism Physician · Bethesda, MD
Enrolled with Medicare as Practitioner - Endocrinology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Joanna Klubo-Gwiezdzinska, MD, PHD is a Endocrinology, Diabetes & Metabolism Physician provider in Bethesda, MD (NPI 1912237058).
Provider details
- NPI number
- 1912237058
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD, PHD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
16 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
160 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 66 | $83 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 58 | $126 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 20 | $178 |
| Subsequent Hospital Care With Straightforward Or Low Level of Medical Decision Making, Per Day, If Using Time, at Least 25 Minutes99231 | 16 | $53 |
Typical Medicare-allowed amounts for these services range $53–$178 (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.
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-01-13
- Last updated
- 2023-05-15
- Certified
- 2023-05-15
Frequently asked questions
- What is Joanna Klubo-Gwiezdzinska's NPI number?
- Joanna Klubo-Gwiezdzinska's National Provider Identifier (NPI) is 1912237058, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Joanna Klubo-Gwiezdzinska's specialty?
- Joanna Klubo-Gwiezdzinska is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Joanna Klubo-Gwiezdzinska located?
- Joanna Klubo-Gwiezdzinska's practice location on file with NPPES is Nih Niddk Building 10 Crc 10 Center Dr, Bethesda, MD 20892-1613.
- What is Joanna Klubo-Gwiezdzinska's phone number?
- The practice phone number listed in the NPPES registry for Joanna Klubo-Gwiezdzinska is (240) 688-3589.
- Does Joanna Klubo-Gwiezdzinska accept Medicare?
- Joanna Klubo-Gwiezdzinska is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Joanna Klubo-Gwiezdzinska's NPI active?
- Yes — Joanna Klubo-Gwiezdzinska's NPI (1912237058) is active in the NPPES registry as of the last update on 2023-05-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.