Caryn Libbey, M.D.
NPI 1417934142 · Rheumatology Physician · Boston, MA
Enrolled with Medicare as Practitioner - Rheumatology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Caryn Libbey, M.D. is a Rheumatology Physician provider in Boston, MA (NPI 1417934142).
Provider details
- NPI number
- 1417934142
- Entity type
- Individual
- Primary specialty
- Rheumatology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- 43031 (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
20 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
188 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 | 118 | $127 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 44 | $151 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 26 | $90 |
Typical Medicare-allowed amounts for these services range $90–$151 (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 · 19 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Methotrexate Sodiumbrand: Methotrexate | 101 | 25 |
| Hydroxychloroquine Sulfate | 68 | 24 |
| Prednisone | 55 | 25 |
| Meloxicam | 42 | 14 |
| Tramadol Hcl | 40 | — |
| Etanerceptbrand: Enbrel Sureclick | 26 | — |
| Alendronate Sodium | 25 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-12-23
- Last updated
- 2013-04-23
Frequently asked questions
- What is Caryn Libbey's NPI number?
- Caryn Libbey's National Provider Identifier (NPI) is 1417934142, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Caryn Libbey's specialty?
- Caryn Libbey is listed in the NPPES registry with a primary specialty of Rheumatology Physician (Allopathic & Osteopathic Physicians).
- Where is Caryn Libbey located?
- Caryn Libbey's practice location on file with NPPES is 725 Albany St, Boston, MA 02118-2526.
- What is Caryn Libbey's phone number?
- The practice phone number listed in the NPPES registry for Caryn Libbey is (617) 638-7460.
- Does Caryn Libbey accept Medicare?
- Caryn Libbey is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Caryn Libbey's NPI active?
- Yes — Caryn Libbey's NPI (1417934142) is active in the NPPES registry as of the last update on 2013-04-23.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.