Tanya Threewitt, M.D.
NPI 1699708610 · Family Medicine Physician · Concord, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tanya Threewitt, M.D. is a Family Medicine Physician provider in Concord, CA (NPI 1699708610).
Provider details
- NPI number
- 1699708610
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Female
- Sole proprietor
- No
- License
- A73909 (CA)
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
395 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 | 145 | $98 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 91 | $86 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 43 | $33 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 37 | $19 |
| Admn Sarscov2 Vacc 1 Dose90480 | 26 | $52 |
| Administration of Influenza Virus Vaccine |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 67 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 242 | 71 |
| Levothyroxine Sodium | 128 | 33 |
| Amlodipine Besylate | 103 | 30 |
| Losartan Potassium | 74 | 23 |
| Rosuvastatin Calcium | 73 | 22 |
| Zolpidem Tartrate | 72 | 14 |
| Alendronate Sodium |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-07-10
- Last updated
- 2012-06-21
Frequently asked questions
- What is Tanya Threewitt's NPI number?
- Tanya Threewitt's National Provider Identifier (NPI) is 1699708610, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tanya Threewitt's specialty?
- Tanya Threewitt is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tanya Threewitt located?
- Tanya Threewitt's practice location on file with NPPES is 5161 Clayton Rd, Concord, CA 94521-3191.
- What is Tanya Threewitt's phone number?
- The practice phone number listed in the NPPES registry for Tanya Threewitt is (925) 609-8282.
- Does Tanya Threewitt accept Medicare?
- Tanya Threewitt is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tanya Threewitt's NPI active?
- Yes — Tanya Threewitt's NPI (1699708610) is active in the NPPES registry as of the last update on 2012-06-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.