Tammy Chew, MD
NPI 1235584863 · Family Medicine Physician · Orange, CA
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Chew, MD is a Family Medicine Physician provider in Orange, CA (NPI 1235584863).
Provider details
- NPI number
- 1235584863
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- Yes
- License
- A150983 (CA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Student, Health Care
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
10 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
2 documented practice locations
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 prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 45 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 281 | 102 |
| Amlodipine Besylate | 166 | 60 |
| Losartan Potassium | 123 | 44 |
| Lisinopril | 99 | 35 |
| Alendronate Sodium | 78 | 25 |
| Levothyroxine Sodium | 63 | 23 |
| Simvastatin | 59 |
Practice location
Mailing address
Additional practice locations (1)
- 6340 Irvine BlvdIrvine, CA 92620-2102Phone: (949) 559-6500
Registry dates
- Enumerated
- 2016-05-02
- Last updated
- 2022-08-01
- Certified
- 2022-08-01
Frequently asked questions
- What is Tammy Chew's NPI number?
- Tammy Chew's National Provider Identifier (NPI) is 1235584863, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Chew's specialty?
- Tammy Chew is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tammy Chew located?
- Tammy Chew's practice location on file with NPPES is 101 the City Dr S, Orange, CA 92868-3201.
- What is Tammy Chew's phone number?
- The practice phone number listed in the NPPES registry for Tammy Chew is (714) 456-7002.
- Does Tammy Chew accept Medicare?
- Tammy Chew is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Chew's NPI active?
- Yes — Tammy Chew's NPI (1235584863) is active in the NPPES registry as of the last update on 2022-08-01.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.