Heidi Chatham, M.D
NPI 1659509834 · Family Medicine Physician · Buffalo Grove, IL
Enrolled with Medicare as Practitioner - Family Practice · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Heidi Chatham, M.D is a Family Medicine Physician provider in Buffalo Grove, IL (NPI 1659509834).
Provider details
- NPI number
- 1659509834
- Entity type
- Individual
- Primary specialty
- Family Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Female
- Sole proprietor
- No
- License
- 57078 (WI)
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 tenure28% of score
16 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
748 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 Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 255 | $96 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 182 | $137 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 154 | $135 |
| Administration of Influenza Virus VaccineG0008 | 37 | $33 |
| Transitional Care Management Services for Problem of at Least Moderate Complexity99495 | 31 | $217 |
| Routine Electrocardiogram (ecg) Using at Least 12 Leads With Interpretation and Report93000 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 106 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Levothyroxine Sodium | 379 | 100 |
| Atorvastatin Calcium | 339 | 98 |
| Amlodipine Besylate | 214 | 61 |
| Lisinopril | 212 | 57 |
| Alprazolam | 178 | 54 |
| Losartan Potassium | 151 | 45 |
| Pravastatin Sodium | 127 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-06-26
- Last updated
- 2021-10-05
- Certified
- 2021-10-05
Frequently asked questions
- What is Heidi Chatham's NPI number?
- Heidi Chatham's National Provider Identifier (NPI) is 1659509834, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Heidi Chatham's specialty?
- Heidi Chatham is listed in the NPPES registry with a primary specialty of Family Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Heidi Chatham located?
- Heidi Chatham's practice location on file with NPPES is 15 S Mchenry Rd, Buffalo Grove, IL 60089-6705.
- What is Heidi Chatham's phone number?
- The practice phone number listed in the NPPES registry for Heidi Chatham is (847) 618-0351.
- Does Heidi Chatham accept Medicare?
- Heidi Chatham is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Heidi Chatham's NPI active?
- Yes — Heidi Chatham's NPI (1659509834) is active in the NPPES registry as of the last update on 2021-10-05.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.