James Lang, M.D.
NPI 1528488798 · Internal Medicine Physician · Chelsea, MA
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
James Lang, M.D. is a Internal Medicine Physician provider in Chelsea, MA (NPI 1528488798).
Provider details
- NPI number
- 1528488798
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 269504 (MA)
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
12 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
1,067 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 | 184 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 124 | $130 |
| Hemoglobin A1c Level83036 | 94 | $9 |
| Blood Test, Thyroid Stimulating Hormone (tsh)84443 | 87 | $16 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 81 | $92 |
| Blood Test, Lipids (cholesterol and Triglycerides)80061 | 79 | $13 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 38 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 185 | 82 |
| Amlodipine Besylate | 74 | 40 |
| Losartan Potassium | 67 | 33 |
| Lisinopril | 65 | 31 |
| Omeprazole | 57 | 25 |
| Levothyroxine Sodium | 55 | 27 |
| Hydrochlorothiazide | 38 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2014-04-25
- Last updated
- 2025-10-15
- Certified
- 2025-10-15
Frequently asked questions
- What is James Lang's NPI number?
- James Lang's National Provider Identifier (NPI) is 1528488798, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is James Lang's specialty?
- James Lang is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is James Lang located?
- James Lang's practice location on file with NPPES is 151 Everett Ave, Chelsea, MA 02150-1807.
- What is James Lang's phone number?
- The practice phone number listed in the NPPES registry for James Lang is (617) 889-8520.
- Does James Lang accept Medicare?
- James Lang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is James Lang's NPI active?
- Yes — James Lang's NPI (1528488798) is active in the NPPES registry as of the last update on 2025-10-15.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.