Timothy Duncan, M.D.
NPI 1669466504 · Gastroenterology Physician · Newport News, VA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Timothy Duncan, M.D. is a Gastroenterology Physician provider in Newport News, VA (NPI 1669466504).
Provider details
- NPI number
- 1669466504
- Entity type
- Individual
- Primary specialty
- Gastroenterology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 0101251786 (VA)
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
4 documented practice locations
- Medicare service volume (vs. specialty peers)28% of score
99 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) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 24 | $239 |
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 24 | $435 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 20 | $88 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 17 | $88 |
| Biopsy of Esophagus, Stomach, And/Or Upper Small Bowel Using a Flexible Endoscope43239 | 14 | $268 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 5 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Gavilyte-G | 27 | 27 |
| Dicyclomine Hcl | 26 | — |
| Omeprazole | 25 | 13 |
| Famotidine | 19 | — |
| Peg3350/Sod Sulf,bicarb,cl/Kclbrand: Peg-3350 and Electrolytes | 12 | 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
Additional practice locations (3)
- 300 Medical Pkwy Ste 106Chesapeake, VA 23320-4985Phone: (757) 606-1720Fax: (757) 606-1721
- 501 Medical DriveHampton, VA 23666-6080Phone: (757) 826-7785Fax: (757) 826-9028
- 2000 Meade Pkwy Ste 400Suffolk, VA 23434-4259Phone: (757) 606-1720Fax: (757) 606-1721
Registry dates
- Enumerated
- 2005-09-07
- Last updated
- 2023-07-19
- Certified
- 2023-07-19
Frequently asked questions
- What is Timothy Duncan's NPI number?
- Timothy Duncan's National Provider Identifier (NPI) is 1669466504, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Timothy Duncan's specialty?
- Timothy Duncan is listed in the NPPES registry with a primary specialty of Gastroenterology Physician (Allopathic & Osteopathic Physicians).
- Where is Timothy Duncan located?
- Timothy Duncan's practice location on file with NPPES is 1031 Loftis Blvd Ste 201, Newport News, VA 23606-2981.
- What is Timothy Duncan's phone number?
- The practice phone number listed in the NPPES registry for Timothy Duncan is (757) 736-9850.
- Does Timothy Duncan accept Medicare?
- Timothy Duncan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Timothy Duncan's NPI active?
- Yes — Timothy Duncan's NPI (1669466504) is active in the NPPES registry as of the last update on 2023-07-19.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.