Dr. John Joseph Grechus, MD
- Medicare services, 2018
- 233
- Part D claims, 2024
- 40
- Industry payments
- $535
- Affiliated sites
- 1
- Medical group
- 1
- Practice address
- 503 N Middle St, Farmington, MO 63640
- Practice phone
- Call (573) 438-9355
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Great Mines Health Center
Farmington, Missouri
Find Dr. Grechus' professional email, personal email and mobile number
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Dr. John Joseph Grechus is an OB-GYN in Farmington, Missouri
Dr. Grechus practices at Great Mines Health Center in Farmington, Missouri.
Dr. Grechus' NPI, 1831171560, was assigned on November 17, 2005. Dr. Grechus graduated from University of Missouri, Kansas City, School of Medicine in 1983. Dr. Grechus holds Missouri license R5F25.
- NPI
- 1831171560NPI Registry (opens in a new tab)
- Medicare PAC ID
- 1254470438
- NPI enumeration date
- November 17, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (573) 438-9355
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 69
- Medical school graduation
- 1983
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. John Joseph Grechus practices at Great Mines Health Center in Farmington, Missouri
Dr. Grechus' primary practice is Great Mines Health Center, at 503 N Middle St, Farmington, MO 63640 in Saint Francois County. The practice phone is (573) 438-9355.
- Great Mines Health Center503 N Middle St, Farmington, MO 63640 · Saint Francois CountyPhone(573) 438-9355
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. John Joseph Grechus is affiliated with 2 sites of care and 1 medical group
Dr. Grechus' primary practice is Great Mines Health Center in Farmington, Missouri. The medical group on file is Great Mines Health Center. Dmand AI also links Dr. Grechus to 1 more group practice or clinic, named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. John Joseph Grechus' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Grechus practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Great Mines Health Center | 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. John Joseph Grechus is one of 712 OB-GYNs in Missouri
Obstetrics and gynecology is Dr. Grechus' primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Grechus is licensed in Missouri.
Specialties and state licenses
- Obstetrics and gynecology, MissouriPrimary
OB-GYNs near Dr. Grechus
Counts of OB-GYNs 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. John Joseph Grechus billed Medicare for 233 services in 2018
CMS data shows 233 Medicare services from Dr. Grechus across 7 procedure codes in 2018. Medicare paid $8,757 for them. Every service was in an office.
Dr. Grechus' Medicare services by type, 2017 to 2018
- 2017
- 2018
- Office and hospital visits
- 2017: 2392018: 14838%
- Other services
- 2017: 1092018: 5450%
- Imaging
- 2017: 622018: 3150%
- Surgery
- 2017: 122018: 0100%
Dr. Grechus compared with the Missouri median for OB-GYNs, 2018
- Dr. Grechus
- Missouri median
- Medicare services
- 233vs 534.4 times
- Part D claims
- 30vs 4533% below
Medians across 650 OB-GYNs in Missouri with Dmand AI profiles that report each measure.
Dr. Grechus' most billed Medicare procedure codes, 2018
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. Grechus?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Grechus and other OB-GYNs in Missouri.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. John Joseph Grechus' patients have a median age of 41
Across all payers, Dmand AI patient panel data puts Dr. Grechus' median patient age at 41, with 100% women.
Dr. Grechus' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 41
Patient panel by sex, all payers
- Women100%
- Men0%
Source: Dmand AI Patient Panel Data
Dr. John Joseph Grechus wrote 40 Medicare Part D claims in 2024
In 2024, Dr. Grechus wrote 40 Medicare Part D claims. 98% of them were for generic drugs. CMS names the drug for 30 of them, across 2 drugs with 11 or more claims each, at $499 in total drug cost. In 2023, CMS named 14 claims across 1 drug.
Dr. Grechus' Part D claims by kind of drug, 2024
- Generic39 claims98%
- Brand-name and other1 claims3%
Dr. Grechus' 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: 142024: 30114%
Drugs named by CMS: 2 in 2024, 1 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. John Joseph Grechus takes part in Medicare
Dr. Grechus 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. John Joseph Grechus received $535 in industry payments from 2016 to 2023
CMS Open Payments shows 28 general payments to Dr. Grechus from 12 drug and device companies from 2016 to 2023. Food and beverage make up the largest share, 100% of the total. Allergan Inc. paid the most, $153.
General payments to Dr. Grechus by program year, 2016 to 2023
Companies that paid Dr. Grechus the most, 2016 to 2023
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. John Joseph Grechus graduated from University of Missouri, Kansas City, School of Medicine
Dr. Grechus graduated from University of Missouri, Kansas City, School of Medicine in 1983.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. John Joseph Grechus'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 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) |
| 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. John Joseph Grechus
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. John Joseph Grechus' NPI number?
Dr. John Joseph Grechus' NPI number is 1831171560. It was assigned on November 17, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. John Joseph Grechus?
Dr. John Joseph Grechus is an OB-GYN in Farmington, Missouri. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. John Joseph Grechus practice?
Dr. Grechus practices at 503 N Middle St, Farmington, MO 63640. Dr. Grechus' primary practice is Great Mines Health Center in Farmington, Missouri. Dmand AI also links Dr. Grechus to 1 group practice or clinic.
What is Dr. John Joseph Grechus' office phone number?
The practice phone on file for Dr. Grechus is (573) 438-9355.
What is Dr. John Joseph Grechus' medical license number?
Dr. Grechus holds Missouri license R5F25.
What medical group is Dr. John Joseph Grechus part of?
Dr. Grechus is linked to Great Mines Health Center.
Does Dr. John Joseph Grechus accept Medicare?
Yes. CMS data shows Dr. Grechus billed Medicare for 233 services in 2018, and Dr. Grechus accepts Medicare assignment.
What services does Dr. John Joseph Grechus bill to Medicare?
In 2018, Dr. Grechus' most billed Medicare services were office visit, established patient (99213), medicare service (G0101) and diagnostic imaging (76376).
Where did Dr. John Joseph Grechus go to medical school?
Dr. Grechus graduated from University of Missouri, Kansas City, School of Medicine in 1983.
What drugs does Dr. John Joseph Grechus prescribe most?
In 2024 Medicare Part D data, Dr. Grechus' most prescribed drugs by claims were Estradiol and Oxybutynin Chloride.
Has Dr. John Joseph Grechus received payments from drug or device companies?
CMS Open Payments shows $535 in general payments to Dr. Grechus from 12 companies from 2016 to 2023. The largest total came from Allergan Inc.
How long has Dr. John Joseph Grechus been practicing?
Dr. Grechus graduated from medical school in 1983, 43 years ago.
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