Gretchen A. Leffler, PA-C
- Medicare patients, 2024
- 70
- Part D claims, 2024
- 4,769
- Hospital affiliations
- 3
- Industry payments
- $22
- Medical group
- 1
- Practice address
- 601 John Street, Kalamazoo, MI 49007
- Practice phone
- Call (269) 341-6000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Gretchen Leffler'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.
Gretchen A. Leffler is a physician assistant in Kalamazoo, Michigan
Gretchen Leffler practices at Bronson Methodist Hospital in Kalamazoo, Michigan, part of Bronson Healthcare Group.
Gretchen Leffler's NPI, 1255457677, was assigned on March 21, 2007. Gretchen Leffler holds Michigan license 5601004107.
- NPI
- 1255457677NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5799879995
- NPI enumeration date
- March 21, 2007
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (269) 341-6000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Female
- Estimated age
- 49
- Medical school graduation
- 2003
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Gretchen A. Leffler practices at Bronson Methodist Hospital in Kalamazoo, Michigan
Gretchen Leffler's primary practice is Bronson Methodist Hospital, at 601 John Street, Kalamazoo, MI 49007 in Kalamazoo County. The practice phone is (269) 341-6000.
- Bronson Methodist Hospital601 John Street, Kalamazoo, MI 49007 · Kalamazoo CountyPhone(269) 341-6000
Source: Dmand AI Affiliation Data
Gretchen A. Leffler is affiliated with 5 sites of care and 1 medical group
Gretchen Leffler's primary practice is Bronson Methodist Hospital in Kalamazoo, Michigan, part of Bronson Healthcare Group. Gretchen Leffler is also affiliated with Beacon Kalamazoo. The medical group on file is Bronson Medical Group. Dmand AI also links Gretchen Leffler to 1 more hospital, 1 group practice or clinic and 1 home health agency, each named with a free account.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Gretchen A. Leffler's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Gretchen Leffler practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Bronson Methodist Hospital | Available with a free account |
| +4 more affiliated sites | Available with a free account |
Source: Dmand AI Technology Install Data
For health IT teams
Dmand AI maps EHR vendors, IT decision makers and buying committees across Bronson Healthcare Group and 6.2K+ hospitals, with verified contacts in the same login.
Gretchen A. Leffler is one of 5,857 physician assistants in Michigan
Physician assistant is Gretchen Leffler's primary specialty in the NPI Registry, under taxonomy code 363A00000X. Gretchen Leffler is licensed in Michigan.
Specialties and state licenses
- Physician assistant, MichiganPrimary
Physician assistants near Gretchen Leffler
Counts of physician assistants 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
Gretchen A. Leffler treated 70 Medicare patients in 2024, average age 72
CMS counts 70 Medicare patients who saw Gretchen Leffler in 2024. The largest group is 65 to 74, with 37 patients. 66% of them have high blood pressure, and 64% have high cholesterol. Their average risk score is 1.17, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Gretchen Leffler's median patient age at 49, with 80% women.
Gretchen Leffler's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Gretchen Leffler's Medicare patients by sex, 2024
- Women4767%
- Men2333%
Chronic conditions among Gretchen Leffler's Medicare patients, 2024
- High blood pressure66%
- High cholesterol64%
- Arthritis46%
- Mood disorders41%
- Depression40%
- Anxiety30%
- Diabetes27%
- COPD24%
Share of Medicare patients with each condition. A patient can have several.
Gretchen Leffler's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 49
Patient panel by sex, all payers
- Women80%
- Men19%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Gretchen A. Leffler wrote 4,769 Medicare Part D claims in 2024
In 2024, Gretchen Leffler wrote 4,769 Medicare Part D claims for 343 patients. 86% of them were for generic drugs.
Gretchen Leffler's Part D claims by kind of drug, 2024
- Generic4,105 claims86%
- Brand-name640 claims13%
- Other24 claims1%
Drug classes CMS tracks in Gretchen Leffler's Part D claims, 2024
- Opioids6%265 of 4,769 claims
- Antibiotics3%120 of 4,769 claims
- Antipsychotics, patients 65 and over0%19 of 4,769 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Source: Medicare Part D Prescribers - by Provider (CMS), 2024 data
How Gretchen A. Leffler takes part in Medicare
Gretchen Leffler accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
For MedTech and pharma teams
Filter 7.4M+ HCPs by Medicare procedures, Part D drugs and Open Payments history, then reach them with verified contacts in one login.
Gretchen A. Leffler received $22 in industry payments in 2025
CMS Open Payments shows 1 general payment to Gretchen Leffler from 1 drug or device company in 2025. Food and beverage make up the largest share, 100% of the total. Abbott Laboratories paid the most, $22.
Companies that paid Gretchen Leffler the most, 2025 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Gretchen A. Leffler'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 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 (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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| 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 Gretchen A. Leffler
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Gretchen A. Leffler's NPI number?
Gretchen A. Leffler's NPI number is 1255457677. It was assigned on March 21, 2007, and it is active in the NPI Registry.
What does Gretchen A. Leffler specialize in?
Gretchen A. Leffler is a physician assistant in Kalamazoo, Michigan. The primary specialty in the NPI Registry is Physician Assistant (taxonomy code 363A00000X).
Where does Gretchen A. Leffler practice?
Gretchen Leffler practices at 601 John Street, Kalamazoo, MI 49007. Gretchen Leffler's primary practice is Bronson Methodist Hospital in Kalamazoo, Michigan, part of Bronson Healthcare Group. Dmand AI also links Gretchen Leffler to 1 hospital, 1 group practice or clinic and 1 home health agency.
What is Gretchen A. Leffler's office phone number?
The practice phone on file for Gretchen Leffler is (269) 341-6000.
What is Gretchen A. Leffler's medical license number?
Gretchen Leffler holds Michigan license 5601004107.
Which hospitals is Gretchen A. Leffler affiliated with?
Gretchen Leffler practices at Bronson Methodist Hospital in Kalamazoo, Michigan. Gretchen Leffler is also affiliated with Beacon Kalamazoo. Dmand AI links Gretchen Leffler to 1 more hospital.
What medical group is Gretchen A. Leffler part of?
Gretchen Leffler is linked to Bronson Medical Group.
Does Gretchen A. Leffler accept Medicare?
Yes. CMS lists Gretchen Leffler as accepting Medicare assignment.
How many Medicare patients does Gretchen A. Leffler see?
CMS counts 70 Medicare patients who saw Gretchen Leffler in 2024, with an average age of 72.
Has Gretchen A. Leffler received payments from drug or device companies?
CMS Open Payments shows $22 in general payments to Gretchen Leffler from 1 company from 2025 to 2025. The largest total came from Abbott Laboratories.
How long has Gretchen A. Leffler been practicing?
Gretchen Leffler graduated from medical school in 2003, 23 years ago.
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