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Dr. Gregory A. Ledger, MD
NPI1205903663PAC ID5092847582
- Medicare services, 2024
- 311
- Medicare patients, 2024
- 214
- Part D claims, 2024
- 975
- Publications
- 2
- Clinical trials
- 2
- Practice address
- 1235 E Cherokee St, Springfield, MO 65804
- Practice phone
- Call (417) 820-2000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Mercy Hospital Springfield & Children's Mercy
Springfield, Missouri
Find Dr. Ledger's professional email, personal email and mobile number
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Dr. Gregory A. Ledger is an endocrinologist in Springfield, Missouri
Dr. Ledger practices at Mercy Hospital Springfield & Children's Mercy in Springfield, Missouri.
Dr. Ledger's NPI, 1205903663, was assigned on November 29, 2006. Dr. Ledger graduated from Indiana University School of Medicine in 1988. Dr. Ledger holds Missouri license 105722.
NPI and contact details
- NPI
- 1205903663NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092847582
- NPI enumeration date
- November 29, 2006
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (417) 820-2000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 64
- Medical school graduation
- 1988
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Gregory A. Ledger practices at Mercy Hospital Springfield & Children's Mercy in Springfield, Missouri
Dr. Ledger's primary practice is Mercy Hospital Springfield & Children's Mercy, at 1235 E Cherokee St, Springfield, MO 65804 in Greene County. The practice phone is (417) 820-2000.
- Mercy Hospital Springfield & Children's Mercy1235 E Cherokee St, Springfield, MO 65804 · Greene CountyPhone(417) 820-2000
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Gregory A. Ledger is affiliated with 2 sites of care and 1 medical group
Dr. Ledger's primary practice is Mercy Hospital Springfield & Children's Mercy in Springfield, Missouri. The medical group on file is Mercy Clinic Family Medicine - Hollister. Dmand AI also links Dr. Ledger to 1 more group practice or clinic, named with a free account.
Mercy Hospital Springfield & Children's MercyPrimary
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Gregory A. Ledger's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Ledger practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Mercy Hospital Springfield & Children's Mercy | Available with a free account |
| +1 more affiliated site | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Gregory A. Ledger is one of 182 endocrinologists in Missouri
Endocrinology, diabetes and metabolism is Dr. Ledger's primary specialty in the NPI Registry, under taxonomy code 207RE0101X. Dr. Ledger is licensed in Missouri.
Specialties and state licenses
- Endocrinology, diabetes and metabolism, MissouriPrimary
Endocrinologists near Dr. Ledger
Counts of endocrinologists 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. Gregory A. Ledger billed Medicare for 311 services in 2024
CMS data shows 311 Medicare services from Dr. Ledger across 6 procedure codes in 2024, for 214 Medicare patients. Medicare paid $15,943 for them. Every service was in an office.
Medicare services, 2024311
Medicare patients214
Paid by Medicare$15,943
Procedure codes6
Dr. Ledger's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 5272024: 23256%
- Other services
- 2023: 02024: 43
- Imaging
- 2023: 142024: 2471%
- Surgery
- 2023: 02024: 12
- Tests and treatments
- 2023: 132024: 0100%
Dr. Ledger compared with the Missouri median for endocrinologists, 2024
- Dr. Ledger
- Missouri median
- Medicare services
- 311vs 77260% below
- Medicare patients
- 214vs 26118% below
- Part D claims
- 735vs 1,61154% below
Medians across 182 endocrinologists in Missouri with Dmand AI profiles that report each measure.
Dr. Ledger'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.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Ledger and other endocrinologists in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Gregory A. Ledger treated 214 Medicare patients in 2024, average age 73
CMS counts 214 Medicare patients who saw Dr. Ledger in 2024. The largest group is 65 to 74, with 102 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 6% are also on Medicaid. Their average risk score is 1.48, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Ledger's median patient age at 69, with 58% women.
Medicare patients, 2024214
Average age73
Average risk score1.48
Also on Medicaid6%
Dr. Ledger's Medicare patients by age, 2024
Dr. Ledger's Medicare patients by sex, 2024
- Women12860%
- Men8640%
Chronic conditions among Dr. Ledger's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Diabetes47%
- Arthritis41%
- Chronic kidney disease31%
- Ischemic heart disease27%
- Mood disorders24%
- Anxiety23%
Share of Medicare patients with each condition. A patient can have several.
Dr. Ledger's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 69
Patient panel by sex, all payers
- Women58%
- Men42%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Gregory A. Ledger wrote 975 Medicare Part D claims in 2024
In 2024, Dr. Ledger wrote 975 Medicare Part D claims for 277 patients. 66% of them were for generic drugs. CMS names the drug for 735 of them, across 23 drugs with 11 or more claims each, at $61,850 in total drug cost. In 2023, CMS named 521 claims across 13 drugs.
Part D claims, 2024975
Drugs named by CMS23
Total drug cost$61,850
Part D patients277
Dr. Ledger's Part D claims by kind of drug, 2024
- Generic646 claims66%
- Brand-name284 claims29%
- Other45 claims5%
Dr. Ledger'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: 5212024: 73541%
Drugs named by CMS: 23 in 2024, 13 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
How Dr. Gregory A. Ledger takes part in Medicare
Dr. Ledger 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)
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Dr. Gregory A. Ledger has 2 publications on record
Dmand AI links 2 papers to Dr. Ledger, published from 2020 to 2023. Dr. Ledger's most frequent co-author is Chaitanya K. Mamillapalli, MD.
Papers2
Years published2020 to 2023
Dr. Ledger's most frequent co-authors
Recent publications by Dr. Ledger
See who Dr. Ledger researches with
Physician Network Discovery turns co-authorship, shared hospitals and shared groups into a map of who Dr. Ledger works with, so you can find a warm path to the right endocrinologists.
Sources: PubMed (National Library of Medicine); and Dmand AI Research Linkage
Dr. Gregory A. Ledger has worked on 2 clinical trials
Dmand AI links Dr. Ledger to 2 clinical trials. Conditions studied include Diabetes Mellitus, Type 2 and Diabetes Mellitus. Eli Lilly and Company sponsors the most, 2. Open Payments lists research payments to Dr. Ledger that name 2 trials.
Conditions in Dr. Ledger's trials
- Diabetes Mellitus, Type 2
- Diabetes Mellitus
Investigators on the most trials with Dr. Ledger
- Ronald H. Chochinov, MD2 shared trials
- Angel Luis Comulada2 shared trials
- Thomas C. Jones, MD2 shared trials
Recent clinical trials with Dr. Ledger
$2,255 in research paymentsDiabetes Mellitus, Type 2Diabetes MellitusDulaglutideTirzepatide
$418 in research paymentsDiabetes Mellitus, Type 2Diabetes MellitusLY900014Insulin Glargine
Sources: Open Payments (CMS), 2025 data, released July 7, 2026; Dmand AI Research Linkage; and ClinicalTrials.gov (National Library of Medicine)
Dr. Gregory A. Ledger received $34,717 in industry payments from 2016 to 2025
CMS Open Payments shows 57 general payments to Dr. Ledger from 11 drug and device companies from 2016 to 2025. Speaker and faculty fees make up the largest share, 71% of the total. Novo Nordisk Inc paid the most, $34,037. It also lists 3 research payments totaling $2,673 from 2020 to 2021, naming 2 clinical trials.
General payments to Dr. Ledger by program year, 2016 to 2025
General payments to Dr. Ledger by kind, 2016 to 2025
$34.7Kin total
- Speaker and faculty fees$24,68071%
- Travel and lodging$7,66522%
- Food and beverage$2,3727%
Companies that paid Dr. Ledger 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. Gregory A. Ledger graduated from Indiana University School of Medicine
Dr. Ledger graduated from Indiana University School of Medicine in 1988.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. Gregory A. Ledger'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 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 |
| Clinical trials and co-investigators | Dmand AI Research LinkageClinicalTrials.gov (National Library of Medicine) (opens in a new tab) |
| Industry payments | Open Payments (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. Gregory A. Ledger
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. Gregory A. Ledger's NPI number?
Dr. Gregory A. Ledger's NPI number is 1205903663. It was assigned on November 29, 2006, and it is active in the NPI Registry.
What kind of doctor is Dr. Gregory A. Ledger?
Dr. Gregory A. Ledger is an endocrinologist in Springfield, Missouri. The primary specialty in the NPI Registry is Endocrinology, Diabetes & Metabolism Physician (taxonomy code 207RE0101X).
Where does Dr. Gregory A. Ledger practice?
Dr. Ledger practices at 1235 E Cherokee St, Springfield, MO 65804. Dr. Ledger's primary practice is Mercy Hospital Springfield & Children's Mercy in Springfield, Missouri. Dmand AI also links Dr. Ledger to 1 group practice or clinic.
What is Dr. Gregory A. Ledger's office phone number?
The practice phone on file for Dr. Ledger is (417) 820-2000.
What is Dr. Gregory A. Ledger's medical license number?
Dr. Ledger holds Missouri license 105722.
What medical group is Dr. Gregory A. Ledger part of?
Dr. Ledger is linked to Mercy Clinic Family Medicine - Hollister.
Does Dr. Gregory A. Ledger accept Medicare?
Yes. CMS data shows Dr. Ledger billed Medicare for 311 services in 2024, and Dr. Ledger accepts Medicare assignment.
How many Medicare patients does Dr. Gregory A. Ledger see?
CMS counts 214 Medicare patients who saw Dr. Ledger in 2024, with an average age of 73.
What services does Dr. Gregory A. Ledger bill to Medicare?
In 2024, Dr. Ledger's most billed Medicare services were office visit, established patient (99214), office visit, new patient (99204) and medicare service (G2211).
Where did Dr. Gregory A. Ledger go to medical school?
Dr. Ledger graduated from Indiana University School of Medicine in 1988.
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What drugs does Dr. Gregory A. Ledger prescribe most?
In 2024 Medicare Part D data, Dr. Ledger's most prescribed drugs by claims were Levothyroxine Sodium, Testosterone and Testosterone Cypionate.
Has Dr. Gregory A. Ledger received payments from drug or device companies?
CMS Open Payments shows $34,717 in general payments to Dr. Ledger from 11 companies from 2016 to 2025. The largest total came from Novo Nordisk Inc.
How long has Dr. Gregory A. Ledger been practicing?
Dr. Ledger graduated from medical school in 1988, 38 years ago.
Does Dr. Gregory A. Ledger do research?
Dmand AI links 2 publications to Dr. Ledger, published from 2020 to 2023. Dr. Ledger has worked on 2 clinical trials.
Who does Dr. Gregory A. Ledger publish with?
Dr. Ledger's most frequent co-authors are Chaitanya K. Mamillapalli, MD (1 shared paper).
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