Catherine Baker, MD
NPI 1871609354 · Internal Medicine Physician · Lemont, IL
Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Catherine Baker, MD is a Internal Medicine Physician provider in Lemont, IL (NPI 1871609354).
Provider details
- NPI number
- 1871609354
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
20 yrs in NPPES registry
- Profile completeness25% of score
83% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
942 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
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 .
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 | 188 | $131 |
| Established Patient Office Or Other Outpatient Visit With High Level of Medical Decision Making, If Using Time, 40 Minutes Or More99215 | 166 | $186 |
| Automated Urinalysis Test81003 | 149 | $2 |
| Hemoglobin A1c Level83036 | 147 | $9 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 125 | $132 |
| Insertion of Needle Into Vein for Collection of Blood Sample36415 | 113 | $9 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 78 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 261 | 80 |
| Lisinopril | 223 | 56 |
| Levothyroxine Sodium | 178 | 47 |
| Metformin Hcl | 154 | 44 |
| Amlodipine Besylate | 146 | 38 |
| Losartan Potassium | 112 | 29 |
| Gabapentin |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$380 across 20 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-08-21
- Last updated
- 2007-07-09
Frequently asked questions
- What is Catherine Baker's NPI number?
- Catherine Baker's National Provider Identifier (NPI) is 1871609354, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Catherine Baker's specialty?
- Catherine Baker is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Catherine Baker located?
- Catherine Baker's practice location on file with NPPES is 15505 127th St, Lemont, IL 60439-4433.
- What is Catherine Baker's phone number?
- The practice phone number listed in the NPPES registry for Catherine Baker is (630) 257-2265.
- Does Catherine Baker accept Medicare?
- Catherine Baker is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Catherine Baker's NPI active?
- Yes — Catherine Baker's NPI (1871609354) is active in the NPPES registry as of the last update on 2007-07-09.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.