Tammy Yao-Hong, D.O.
NPI 1801108261 · Internal Medicine Physician · Evanston, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tammy Yao-Hong, D.O. is a Internal Medicine Physician provider in Evanston, IL (NPI 1801108261).
Provider details
- NPI number
- 1801108261
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- D.O.
- Sex
- Female
- Sole proprietor
- Yes
- License
- 125057961 (IL)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
15 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
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 · 52 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 186 | 76 |
| Rosuvastatin Calcium | 95 | 43 |
| Amlodipine Besylate | 87 | 47 |
| Losartan Potassium | 73 | 31 |
| Lisinopril | 63 | 30 |
| Meloxicam | 56 | 32 |
| Glipizide | 55 | 19 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2010-07-13
- Last updated
- 2021-11-18
- Certified
- 2021-11-18
Frequently asked questions
- What is Tammy Yao-Hong's NPI number?
- Tammy Yao-Hong's National Provider Identifier (NPI) is 1801108261, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tammy Yao-Hong's specialty?
- Tammy Yao-Hong is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Tammy Yao-Hong located?
- Tammy Yao-Hong's practice location on file with NPPES is 2650 Ridge Ave, Evanston, IL 60201-1718.
- What is Tammy Yao-Hong's phone number?
- The practice phone number listed in the NPPES registry for Tammy Yao-Hong is (847) 570-2509.
- Does Tammy Yao-Hong accept Medicare?
- Tammy Yao-Hong is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tammy Yao-Hong's NPI active?
- Yes — Tammy Yao-Hong's NPI (1801108261) is active in the NPPES registry as of the last update on 2021-11-18.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.