Dr. Mary Michael Westerholm, MD
- Medicare services, 2021
- 18
- Part D claims, 2024
- 410
- MIPS score, 2024
- 96
- Hospital affiliations
- 1
- Medical groups
- 2
- Practice address
- 3860 W Ogden Ave, Chicago, IL 60623
- Practice phone
- Call (312) 521-5006
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Lawndale Christian Health Center
FQHC - Main Site · Chicago, Illinois
Find Dr. Westerholm's professional email, personal email and mobile number
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Dr. Mary Michael Westerholm is an internist in Chicago, Illinois
Dr. Westerholm practices at Lawndale Christian Health Center in Chicago, Illinois.
Dr. Westerholm's NPI, 1790951093, was assigned on May 6, 2008. Dr. Westerholm graduated from Loyola University of Chicago, Stritch School of Medicine in 2004. Dr. Westerholm holds Illinois license 036116854.
- NPI
- 1790951093NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4880752609
- NPI enumeration date
- May 6, 2008
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (312) 521-5006
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 48
- Medical school graduation
- 2004
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Mary Michael Westerholm practices at Lawndale Christian Health Center in Chicago, Illinois
Dr. Westerholm's primary practice is Lawndale Christian Health Center, at 3860 W Ogden Ave, Chicago, IL 60623 in Cook County. The practice phone is (312) 521-5006.
- Lawndale Christian Health Center3860 W Ogden Ave, Chicago, IL 60623 · Cook CountyPhone(312) 521-5006
Source: Dmand AI Affiliation Data
Dr. Mary Michael Westerholm is affiliated with 2 sites of care and 2 medical groups
Dr. Westerholm's primary practice is Lawndale Christian Health Center in Chicago, Illinois. Dr. Westerholm is also affiliated with Northwestern Medicine Central DuPage Hospital. The medical group on file is Lawndale Christian Health Center. Dmand AI also links Dr. Westerholm to 1 more medical group, named with a free account. Dr. Westerholm's employer is on file too: a community health center (fqhc).
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Mary Michael Westerholm's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Westerholm practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Lawndale Christian Health Center | Available with a free account |
| +1 more site and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Mary Michael Westerholm is one of 5,652 internists in Illinois
Internal medicine is Dr. Westerholm's primary specialty in the NPI Registry, under taxonomy code 207R00000X. Dr. Westerholm is licensed in Illinois.
Specialties and state licenses
- Internal medicine, IllinoisPrimary
Internists near Dr. Westerholm
Counts of internists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. Mary Michael Westerholm billed Medicare for 18 services in 2021
CMS data shows 18 Medicare services from Dr. Westerholm across 1 procedure code in 2021. Medicare paid $526 for them. Every service was in an office.
Dr. Westerholm compared with the Illinois median for internists, 2021
- Dr. Westerholm
- Illinois median
- Medicare services
- 18vs 56697% below
- Part D claims
- 136vs 28452% below
Medians across 5,192 internists in Illinois with Dmand AI profiles that report each measure.
Dr. Westerholm's most billed Medicare procedure codes, 2021
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Westerholm and other internists in Illinois.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Mary Michael Westerholm's patients have a median age of 59
Across all payers, Dmand AI patient panel data puts Dr. Westerholm's median patient age at 59, with 57% women.
Dr. Westerholm's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 59
Patient panel by sex, all payers
- Women57%
- Men43%
Source: Dmand AI Patient Panel Data
Dr. Mary Michael Westerholm wrote 410 Medicare Part D claims in 2024
In 2024, Dr. Westerholm wrote 410 Medicare Part D claims for 28 patients. 75% of them were for generic drugs. CMS names the drug for 136 of them, across 8 drugs with 11 or more claims each, at $33,411 in total drug cost. In 2023, CMS named 111 claims across 7 drugs.
Dr. Westerholm's Part D claims by kind of drug, 2024
- Generic308 claims75%
- Brand-name and other102 claims25%
Dr. Westerholm'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.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 1112024: 13623%
Drugs named by CMS: 8 in 2024, 7 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. Mary Michael Westerholm scored 96 out of 100 in Medicare's MIPS program for 2024
CMS publishes a Merit-based Incentive Payment System (MIPS) score of 96 out of 100 for Dr. Westerholm for performance year 2024, reported through an alternative payment model (APM). Dr. Westerholm accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Dr. Westerholm's MIPS scores, performance year 2024
- 96of 100Final score
- 88.5of 100Quality
- 100of 100Promoting Interoperability
- 40of 100Improvement Activities
Each score is out of 100. The final score weighs the categories CMS scored for this clinician.
Sources: Doctors and Clinicians National Downloadable File (CMS); and Clinician Public Reporting: Overall MIPS Performance (CMS), 2024 data, released September 10, 2026
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Dr. Mary Michael Westerholm graduated from Loyola University of Chicago, Stritch School of Medicine
Dr. Westerholm graduated from Loyola University of Chicago, Stritch School of Medicine in 2004.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Mary Michael Westerholm'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 | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand 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 Data |
| 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)Clinician Public Reporting: Overall MIPS Performance (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile 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. Mary Michael Westerholm
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. Mary Michael Westerholm's NPI number?
Dr. Mary Michael Westerholm's NPI number is 1790951093. It was assigned on May 6, 2008, and it is active in the NPI Registry.
What kind of doctor is Dr. Mary Michael Westerholm?
Dr. Mary Michael Westerholm is an internist in Chicago, Illinois. The primary specialty in the NPI Registry is Internal Medicine Physician (taxonomy code 207R00000X).
Where does Dr. Mary Michael Westerholm practice?
Dr. Westerholm practices at 3860 W Ogden Ave, Chicago, IL 60623. Dr. Westerholm's primary practice is Lawndale Christian Health Center in Chicago, Illinois. Dmand AI also links Dr. Westerholm to 1 medical group.
What is Dr. Mary Michael Westerholm's office phone number?
The practice phone on file for Dr. Westerholm is (312) 521-5006.
What is Dr. Mary Michael Westerholm's medical license number?
Dr. Westerholm holds Illinois license 036116854.
Which hospitals is Dr. Mary Michael Westerholm affiliated with?
Dr. Westerholm is affiliated with Northwestern Medicine Central DuPage Hospital.
What medical group is Dr. Mary Michael Westerholm part of?
Dr. Westerholm is linked to Lawndale Christian Health Center. Dmand AI links Dr. Westerholm to 1 more medical group.
Does Dr. Mary Michael Westerholm accept Medicare?
Yes. CMS data shows Dr. Westerholm billed Medicare for 18 services in 2021, and Dr. Westerholm accepts Medicare assignment.
What is Dr. Mary Michael Westerholm's MIPS score?
Dr. Westerholm's MIPS final score for performance year 2024 is 96 out of 100, reported through an alternative payment model (APM).
What services does Dr. Mary Michael Westerholm bill to Medicare?
In 2021, Dr. Westerholm's most billed Medicare services were medical service (0012A).
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Where did Dr. Mary Michael Westerholm go to medical school?
Dr. Westerholm graduated from Loyola University of Chicago, Stritch School of Medicine in 2004.
What drugs does Dr. Mary Michael Westerholm prescribe most?
In 2024 Medicare Part D data, Dr. Westerholm's most prescribed drugs by claims were Atorvastatin Calcium, Gabapentin and Ozempic.
How long has Dr. Mary Michael Westerholm been practicing?
Dr. Westerholm graduated from medical school in 2004, 22 years ago.
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