Harold Carlson, M.D.
NPI 1194750034 · Endocrinology, Diabetes & Metabolism Physician · East Setauket, NY
Harold Carlson, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in East Setauket, NY (NPI 1194750034).
Provider details
- NPI number
- 1194750034
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 163591 (NY)
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
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
37 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 Straightforward Medical Decision Making, If Using Time, 10 Minutes Or More99212 | 22 | $67 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 15 | $106 |
Typical Medicare-allowed amounts for these services range $67–$106 (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 · 4 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 82 | 25 |
| Methimazole | 16 | — |
| Atorvastatin Calcium | 16 | — |
| Insulin Glargine,hum.rec.anlogbrand: Lantus | 12 | — |
Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do notinclude cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-11
- Last updated
- 2022-04-27
- Certified
- 2022-04-27
Frequently asked questions
- What is Harold Carlson's NPI number?
- Harold Carlson's National Provider Identifier (NPI) is 1194750034, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Harold Carlson's specialty?
- Harold Carlson is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Harold Carlson located?
- Harold Carlson's practice location on file with NPPES is 26 Research Way, East Setauket, NY 11733.
- What is Harold Carlson's phone number?
- The practice phone number listed in the NPPES registry for Harold Carlson is (631) 444-0580.
- Is Harold Carlson's NPI active?
- Yes — Harold Carlson's NPI (1194750034) is active in the NPPES registry as of the last update on 2022-04-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.