Mark Sklar, M.D.
NPI 1720083223 · Endocrinology, Diabetes & Metabolism Physician · Washington, DC
Mark Sklar, M.D. is a Endocrinology, Diabetes & Metabolism Physician provider in Washington, DC (NPI 1720083223).
Provider details
- NPI number
- 1720083223
- Entity type
- Individual
- Primary specialty
- Endocrinology, Diabetes & Metabolism PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- License
- MD18512 (DC)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
21 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
1,141 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 346 | $134 |
| Insertion of Needle Into Vein (3 Years Or Older)36410 | 292 | $19 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 160 | $96 |
| Ultrasound Scan of Head and Neck Soft Tissue76536 | 88 | $120 |
| Continuous Monitoring of Blood Sugar Level in Tissue Fluid Using Sensor Under Skin With Interpretation and Report95251 | 63 | $35 |
| Telephone Medical Discussion With Physician, 11-20 Minutes99442 | 51 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 53 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodiumbrand: Synthroid | 247 | 63 |
| Levothyroxine Sodium | 207 | 55 |
| Semaglutidebrand: Ozempic | 123 | 23 |
| Atorvastatin Calcium | 112 | 35 |
| Metformin Hcl | 110 | 32 |
| Metformin Hclbrand: Metformin Hcl Er | 101 | 34 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$1,925 across 74 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2005-06-20
- Last updated
- 2007-07-08
Frequently asked questions
- What is Mark Sklar's NPI number?
- Mark Sklar's National Provider Identifier (NPI) is 1720083223, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Mark Sklar's specialty?
- Mark Sklar is listed in the NPPES registry with a primary specialty of Endocrinology, Diabetes & Metabolism Physician (Allopathic & Osteopathic Physicians).
- Where is Mark Sklar located?
- Mark Sklar's practice location on file with NPPES is 3 Washington Cir Nw, Washington, DC 20037-2311.
- What is Mark Sklar's phone number?
- The practice phone number listed in the NPPES registry for Mark Sklar is (202) 887-4769.
- Is Mark Sklar's NPI active?
- Yes — Mark Sklar's NPI (1720083223) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.