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Dr. Stephen Michael Grohmann, MD
NPI1033163191PAC ID0244304764
- Medicare services, 2024
- 842
- Medicare patients, 2024
- 213
- Part D claims, 2024
- 437
- Publications
- 1
- Hospital affiliations
- 3
- Practice address
- 1000 N Westmoreland Rd, Lake Forest, IL 60045
- Practice phone
- Call (847) 234-5600
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Northwestern Catherine Gratz Griffin Lake Forest Hospital
Lake Forest, Illinois
Find Dr. Grohmann's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. Stephen Michael Grohmann is an infectious disease specialist in Lake Forest, Illinois
Dr. Grohmann practices at Northwestern Catherine Gratz Griffin Lake Forest Hospital in Lake Forest, Illinois.
Dr. Grohmann's NPI, 1033163191, was assigned on May 20, 2006. Dr. Grohmann graduated from University Of Louisville School Of Medicine in 1986. Dr. Grohmann holds Illinois license 036078269.
NPI and contact details
- NPI
- 1033163191NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0244304764
- NPI enumeration date
- May 20, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
- Practice phone
- (847) 234-5600
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Stephen Michael Grohmann practices at Northwestern Catherine Gratz Griffin Lake Forest Hospital in Lake Forest, Illinois
Dr. Grohmann's primary practice is Northwestern Catherine Gratz Griffin Lake Forest Hospital, at 1000 N Westmoreland Rd, Lake Forest, IL 60045 in Lake County. The practice phone is (847) 234-5600.
- Northwestern Catherine Gratz Griffin Lake Forest Hospital1000 N Westmoreland Rd, Lake Forest, IL 60045 · Lake CountyPhone(847) 234-5600
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Stephen Michael Grohmann is affiliated with 6 sites of care and 1 medical group
Dr. Grohmann's primary practice is Northwestern Catherine Gratz Griffin Lake Forest Hospital in Lake Forest, Illinois. Dr. Grohmann is also affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital. The medical group on file is Infectious Disease Consultants, Ltd. Dmand AI also links Dr. Grohmann to 2 more hospitals, 1 group practice or clinic and 1 home health agency, each named with a free account.
Northwestern Catherine Gratz Griffin Lake Forest HospitalPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Stephen Michael Grohmann's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grohmann practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Northwestern Catherine Gratz Griffin Lake Forest Hospital | Available with a free account |
| +5 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
See the EHR and IT leaders at every site where Dr. Grohmann practices
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Dr. Stephen Michael Grohmann is one of 400 infectious disease specialists in Illinois
Infectious disease is Dr. Grohmann's primary specialty in the NPI Registry, under taxonomy code 207RI0200X. Dr. Grohmann is board certified in infectious disease by the American Board of Internal Medicine. Dr. Grohmann is licensed in Illinois.
Specialties and state licenses
- Infectious disease, IllinoisPrimary
Clinical focus
Dmand AI lists acute skin infection, endocarditis, joint or bone infection and pneumonia among the conditions Dr. Grohmann treats.
Infectious disease specialists near Dr. Grohmann
Counts of infectious disease specialists with a Dmand AI profile, by place and practice. Each opens the list.
400infectious disease specialists in Illinois
2infectious disease specialists in Lake Forest
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Stephen Michael Grohmann billed Medicare for 842 services in 2024
CMS data shows 842 Medicare services from Dr. Grohmann across 7 procedure codes in 2024, for 213 Medicare patients. Medicare paid $87,338 for them.
Medicare services, 2024842
Medicare patients213
Paid by Medicare$87,338
Procedure codes7
Dr. Grohmann's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 7812024: 8002%
- Other services
- 2023: 322024: 4231%
Where Dr. Grohmann's Medicare services took place, 2024
- In an office637%
- In a facility77993%
Dr. Grohmann compared with the Illinois median for infectious disease specialists, 2024
- Dr. Grohmann
- Illinois median
- Medicare services
- 842vs 44091% above
- Medicare patients
- 213vs 210Close to median
- Part D claims
- 353vs 19581% above
Medians across 383 infectious disease specialists in Illinois with Dmand AI profiles that report each measure.
Dr. Grohmann's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
Need commercial claims for Dr. Grohmann?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grohmann and other infectious disease specialists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Stephen Michael Grohmann treated 213 Medicare patients in 2024, average age 75
CMS counts 213 Medicare patients who saw Dr. Grohmann in 2024. The largest group is 65 to 74, with 78 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 17% are also on Medicaid. Their average risk score is 3.16, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Grohmann's median patient age at 68, with 46% women.
Medicare patients, 2024213
Average age75
Average risk score3.16
Also on Medicaid17%
Dr. Grohmann's Medicare patients by age, 2024
Dr. Grohmann's Medicare patients by sex, 2024
- Women10047%
- Men11353%
Chronic conditions among Dr. Grohmann's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis68%
- Ischemic heart disease63%
- Chronic kidney disease59%
- Diabetes56%
- Heart failure47%
- Atrial fibrillation44%
Share of Medicare patients with each condition. A patient can have several.
Dr. Grohmann's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 68
Patient panel by sex, all payers
- Women46%
- Men54%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Stephen Michael Grohmann wrote 437 Medicare Part D claims in 2024
In 2024, Dr. Grohmann wrote 437 Medicare Part D claims for 78 patients. 85% of them were for generic drugs. CMS names the drug for 353 of them, across 14 drugs with 11 or more claims each, at $178,982 in total drug cost. In 2023, CMS named 276 claims across 12 drugs.
Part D claims, 2024437
Drugs named by CMS14
Total drug cost$178,982
Part D patients78
Dr. Grohmann's Part D claims by kind of drug, 2024
- Generic370 claims85%
- Brand-name67 claims15%
Dr. Grohmann's most prescribed drugs by claims, 2024
CMS names a drug when it has 11 or more claims. Share is of the claims for drugs CMS names.
Drug classes CMS tracks in Dr. Grohmann's Part D claims, 2024
- Antibiotics81%356 of 437 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 2762024: 35328%
Drugs named by CMS: 14 in 2024, 12 in 2023.
Sources: Medicare Part D Prescribers - by Provider and Drug (CMS), 2024 data, released May 6, 2026; and Medicare Part D Prescribers - by Provider (CMS), 2024 data
Dr. Stephen Michael Grohmann offers telehealth to Medicare patients
Dr. Grohmann accepts Medicare assignment, so Medicare's approved amount is taken as full payment. CMS lists Dr. Grohmann as offering telehealth.
- Accepts Medicare assignment
- Yes
- Offers telehealth
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. Stephen Michael Grohmann has 1 publication on record
Dmand AI links 1 paper to Dr. Grohmann in 2019. Dr. Grohmann's most frequent co-author is Michael A. Grassi, MD.
Papers1
Dr. Grohmann's most frequent co-authors
Recent publications by Dr. Grohmann
See who Dr. Grohmann researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Grohmann works with, so you can find a warm path to the right infectious disease specialists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Stephen Michael Grohmann received $1,465 in industry payments from 2016 to 2025
CMS Open Payments shows 22 general payments to Dr. Grohmann from 3 drug and device companies from 2016 to 2025. Food and beverage make up the largest share, 96% of the total. Gilead Sciences, Inc. paid the most, $1,152.
General payments to Dr. Grohmann by program year, 2016 to 2025
General payments to Dr. Grohmann by kind, 2016 to 2025
$1.5Kin total
- Food and beverage$1,41096%
- Education$554%
Companies that paid Dr. Grohmann the most, 2016 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Stephen Michael Grohmann has 9 awards and honors on record
Dmand AI lists 9 awards for Dr. Grohmann, most recently CMS Stage 1 EHR in 2013.
Awards and honors for Dr. Grohmann
- 2013
- CMS Stage 1 EHR
- 2012
- ACP Fellow
- 1994
- Attending Physician of the Year for Resident Education
- 1986
- Phi Kappa Phi Honor Society
- 1985
- Alpha Omega Alpha Honor Society
- Undated
- Elected to Mortar Board
Source: Dmand AI Professional Profile Data
Dr. Stephen Michael Grohmann graduated from University Of Louisville School Of Medicine
Dr. Grohmann graduated from University Of Louisville School Of Medicine in 1986. Dr. Grohmann is a member of ACP.
- Medical school
- Board certified in infectious disease
- Board certified in internal medicine
Source: Dmand AI Professional Profile Data
Dr. Stephen Michael Grohmann accepts plans from 15 insurance carriers
Dr. Grohmann is in network with 15 carriers, including Aetna, HCSC and Cigna. HMO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- HCSC
- Cigna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Elevance
- Humana
- Aspirus Health Plan
- +7 more carriersWith a free account
Plan types Dr. Grohmann accepts, by number of carriers
- HMO9
- PPO9
- POS7
- Medicare6
- EPO4
- Medicaid1
Source: Dmand AI Insurance Network Data
Sources for Dr. Stephen Michael Grohmann's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| Part D prescribing | Medicare Part D Prescribers - by Provider and Drug (CMS) (opens in a new tab)Medicare Part D Prescribers - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Publications, topics and co-authors | PubMed (National Library of Medicine) (opens in a new tab)Dmand AI Research Linkage |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Awards and committee roles | Dmand AI Professional Profile Data |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. Stephen Michael Grohmann
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Dr. Stephen Michael Grohmann's NPI number?
Dr. Stephen Michael Grohmann's NPI number is 1033163191. It was assigned on May 20, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Stephen Michael Grohmann?
Dr. Stephen Michael Grohmann is an infectious disease specialist in Lake Forest, Illinois. The primary specialty in the NPI Registry is Infectious Disease Physician (taxonomy code 207RI0200X).
Where does Dr. Stephen Michael Grohmann practice?
Dr. Grohmann practices at 1000 N Westmoreland Rd, Lake Forest, IL 60045. Dr. Grohmann's primary practice is Northwestern Catherine Gratz Griffin Lake Forest Hospital in Lake Forest, Illinois. Dmand AI also links Dr. Grohmann to 2 hospitals, 1 group practice or clinic and 1 home health agency.
What is Dr. Stephen Michael Grohmann's office phone number?
The practice phone on file for Dr. Grohmann is (847) 234-5600.
What is Dr. Stephen Michael Grohmann's medical license number?
Dr. Grohmann holds Illinois license 036078269.
Which hospitals is Dr. Stephen Michael Grohmann affiliated with?
Dr. Grohmann is affiliated with Northwestern Medicine Catherine Gratz Griffin Lake Forest Hospital. Dmand AI links Dr. Grohmann to 2 more hospitals.
What medical group is Dr. Stephen Michael Grohmann part of?
Dr. Grohmann is linked to Infectious Disease Consultants, Ltd.
Does Dr. Stephen Michael Grohmann accept Medicare?
Yes. CMS data shows Dr. Grohmann billed Medicare for 842 services in 2024, and Dr. Grohmann accepts Medicare assignment.
Does Dr. Stephen Michael Grohmann offer telehealth?
Yes. The CMS Doctors and Clinicians file lists Dr. Grohmann as offering telehealth services.
How many Medicare patients does Dr. Stephen Michael Grohmann see?
CMS counts 213 Medicare patients who saw Dr. Grohmann in 2024, with an average age of 75.
Show 9 more questionsShow fewer questions
Is Dr. Stephen Michael Grohmann board certified?
Yes. Dr. Grohmann is board certified in infectious disease by the American Board of Internal Medicine.
What services does Dr. Stephen Michael Grohmann bill to Medicare?
In 2024, Dr. Grohmann's most billed Medicare services were hospital inpatient care (99233), hospital inpatient care (99223) and critical care (99291).
Where did Dr. Stephen Michael Grohmann go to medical school?
Dr. Grohmann graduated from University Of Louisville School Of Medicine in 1986.
What drugs does Dr. Stephen Michael Grohmann prescribe most?
In 2024 Medicare Part D data, Dr. Grohmann's most prescribed drugs by claims were Vancomycin HCl, Daptomycin and Ceftriaxone.
Has Dr. Stephen Michael Grohmann received payments from drug or device companies?
CMS Open Payments shows $1,465 in general payments to Dr. Grohmann from 3 companies from 2016 to 2025. The largest total came from Gilead Sciences, Inc.
How long has Dr. Stephen Michael Grohmann been practicing?
Dr. Grohmann graduated from medical school in 1986, 40 years ago.
Does Dr. Stephen Michael Grohmann do research?
Dmand AI links 1 publication to Dr. Grohmann.
Who does Dr. Stephen Michael Grohmann publish with?
Dr. Grohmann's most frequent co-authors are Michael A. Grassi, MD (1 shared paper).
What insurance does Dr. Stephen Michael Grohmann accept?
Dr. Grohmann is in network with 15 carriers, including Aetna, HCSC and Cigna. HMO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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