Stephen Grohmann, M.D.
NPI 1033163191 · Infectious Disease Physician · Chicago, IL
Enrolled with Medicare as Practitioner - Infectious Disease · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Stephen Grohmann, M.D. is a Infectious Disease Physician provider in Chicago, IL (NPI 1033163191).
Provider details
- NPI number
- 1033163191
- Entity type
- Individual
- Primary specialty
- Infectious Disease PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 036078269 (IL)
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
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
842 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) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 512 | $120 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 | 130 | $175 |
| Critical Care, First 30-74 Minutes99291 | 59 | $217 |
| Prolonged Hospital Inpatient Or Observation Care Evaluation and Management Service(s) Beyond the Total Time for the Primary Service (when the Primary Service Has Been Selected Using Time on the Date of the Primary Service); Each Additional 15 Minutes By ThG0316 | 42 | $31 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 40 | $132 |
| Initial Hospital Care With Straightforward Or Low-Level Medical Decision Making, If Using Time, at Least 55 Minutes |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 14 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Vancomycin Hcl | 56 | — |
| Daptomycin | 50 | 12 |
| Ceftriaxone Sodiumbrand: Ceftriaxone | 47 | — |
| Cefadroxil | 41 | 11 |
| Doxycycline Hyclate | 26 | — |
| Ertapenem Sodiumbrand: Ertapenem | 26 | 12 |
| Fluconazole | 16 | — |
| Cephalexin | 14 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$125 across 1 record (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
- 2006-05-20
- Last updated
- 2008-04-14
Frequently asked questions
- What is Stephen Grohmann's NPI number?
- Stephen Grohmann's National Provider Identifier (NPI) is 1033163191, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Stephen Grohmann's specialty?
- Stephen Grohmann is listed in the NPPES registry with a primary specialty of Infectious Disease Physician (Allopathic & Osteopathic Physicians).
- Where is Stephen Grohmann located?
- Stephen Grohmann's practice location on file with NPPES is 2740 W Foster Ave, Chicago, IL 60625-3500.
- What is Stephen Grohmann's phone number?
- The practice phone number listed in the NPPES registry for Stephen Grohmann is (773) 907-3400.
- Does Stephen Grohmann accept Medicare?
- Stephen Grohmann is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Stephen Grohmann's NPI active?
- Yes — Stephen Grohmann's NPI (1033163191) is active in the NPPES registry as of the last update on 2008-04-14.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.