Dr. Darryl C. Johnson, DO
- Medicare services, 2024
- 336
- Medicare patients, 2024
- 142
- Part D claims, 2024
- 224
- Hospital affiliations
- 1
- Industry payments
- $1,199
- Practice address
- 1015 Duff Ave, Ames, IA 50010
- Practice phone
- Call (515) 239-4400
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
McFarland Clinic
Ames, Iowa
Find Dr. Johnson'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. Darryl C. Johnson is an OB-GYN in Ames, Iowa
Dr. Johnson practices at McFarland Clinic in Ames, Iowa.
Dr. Johnson's NPI, 1720084916, was assigned on June 22, 2005. Dr. Johnson holds Iowa license 02790.
- NPI
- 1720084916NPI Registry (opens in a new tab)
- Medicare PAC ID
- 8325043987
- NPI enumeration date
- June 22, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (515) 239-4400
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 65
- Medical school graduation
- 1987
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Darryl C. Johnson practices at McFarland Clinic in Ames, Iowa
Dr. Johnson's primary practice is McFarland Clinic, at 1015 Duff Ave, Ames, IA 50010 in Story County. The practice phone is (515) 239-4400.
- McFarland Clinic1015 Duff Ave, Ames, IA 50010 · Story CountyPhone(515) 239-4400
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Darryl C. Johnson is affiliated with 3 sites of care and 2 medical groups
Dr. Johnson's primary practice is McFarland Clinic in Ames, Iowa. Dr. Johnson is also affiliated with Mary Greeley Medical Center. The medical group on file is McFarland Clinic. Dmand AI also links Dr. Johnson to 1 more group practice or clinic and 1 medical group, each 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. Darryl C. Johnson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Johnson practices, 2 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| McFarland Clinic | Available with a free account |
| +2 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Darryl C. Johnson is one of 291 OB-GYNs in Iowa
Obstetrics and gynecology is Dr. Johnson's primary specialty in the NPI Registry, under taxonomy code 207V00000X. Dr. Johnson is licensed in Iowa.
Specialties and state licenses
- Obstetrics and gynecology, IowaPrimary
OB-GYNs near Dr. Johnson
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. Darryl C. Johnson billed Medicare for 336 services in 2024
CMS data shows 336 Medicare services from Dr. Johnson across 9 procedure codes in 2024, for 142 Medicare patients. Medicare paid $21,165 for them.
Dr. Johnson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1542024: 22345%
- Surgery
- 2023: 372024: 6986%
- Other services
- 2023: 02024: 23
- Imaging
- 2023: 02024: 21
Where Dr. Johnson's Medicare services took place, 2024
- In an office31594%
- In a facility216%
Dr. Johnson compared with the Iowa median for OB-GYNs, 2024
- Dr. Johnson
- Iowa median
- Medicare services
- 336vs 437.8 times
- Medicare patients
- 142vs 393.6 times
- Part D claims
- 170vs 286.1 times
Medians across 291 OB-GYNs in Iowa with Dmand AI profiles that report each measure.
Dr. Johnson'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. Johnson?
Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Johnson and other OB-GYNs in Iowa.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Darryl C. Johnson treated 142 Medicare patients in 2024, average age 74
CMS counts 142 Medicare patients who saw Dr. Johnson in 2024. The largest group is 65 to 74, with 74 patients. 75% of them have high cholesterol, and 65% have high blood pressure. Their average risk score is 0.89, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Johnson's median patient age at 41, with 99% women.
Dr. Johnson's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Chronic conditions among Dr. Johnson's Medicare patients, 2024
- High cholesterol75%
- High blood pressure65%
- Arthritis39%
- Mood disorders27%
- Depression25%
- Osteoporosis21%
- Chronic kidney disease19%
- Diabetes19%
Share of Medicare patients with each condition. A patient can have several.
Dr. Johnson's 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
- Women99%
- Men0%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Darryl C. Johnson wrote 224 Medicare Part D claims in 2024
In 2024, Dr. Johnson wrote 224 Medicare Part D claims for 79 patients. 97% of them were for generic drugs. CMS names the drug for 170 of them, across 4 drugs with 11 or more claims each, at $3,020 in total drug cost. In 2023, CMS named 102 claims across 4 drugs.
Dr. Johnson's Part D claims by kind of drug, 2024
- Generic217 claims97%
- Brand-name and other7 claims3%
Dr. Johnson'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: 1022024: 17067%
Drugs named by CMS: 4 in 2024, 4 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. Darryl C. Johnson takes part in Medicare
Dr. Johnson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Removal of the uterus: 1 to 10 procedures (CMS shows small counts as a range)
Sources: Doctors and Clinicians National Downloadable File (CMS); and Doctors and Clinicians Utilization Data (CMS)
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Dr. Darryl C. Johnson received $1,199 in industry payments from 2018 to 2024
CMS Open Payments shows 81 general payments to Dr. Johnson from 23 drug and device companies from 2018 to 2024. Food and beverage make up the largest share, 100% of the total. Astellas Pharma US Inc paid the most, $210.
General payments to Dr. Johnson by program year, 2018 to 2024
Companies that paid Dr. Johnson the most, 2018 to 2024
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Sources for Dr. Darryl C. Johnson'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)Doctors and Clinicians Utilization Data (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 Dr. Darryl C. Johnson
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. Darryl C. Johnson's NPI number?
Dr. Darryl C. Johnson's NPI number is 1720084916. It was assigned on June 22, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Darryl C. Johnson?
Dr. Darryl C. Johnson is an OB-GYN in Ames, Iowa. The primary specialty in the NPI Registry is Obstetrics & Gynecology Physician (taxonomy code 207V00000X).
Where does Dr. Darryl C. Johnson practice?
Dr. Johnson practices at 1015 Duff Ave, Ames, IA 50010. Dr. Johnson's primary practice is McFarland Clinic in Ames, Iowa. Dmand AI also links Dr. Johnson to 1 group practice or clinic and 1 medical group.
What is Dr. Darryl C. Johnson's office phone number?
The practice phone on file for Dr. Johnson is (515) 239-4400.
What is Dr. Darryl C. Johnson's medical license number?
Dr. Johnson holds Iowa license 02790.
Which hospitals is Dr. Darryl C. Johnson affiliated with?
Dr. Johnson is affiliated with Mary Greeley Medical Center.
What medical group is Dr. Darryl C. Johnson part of?
Dr. Johnson is linked to McFarland Clinic. Dmand AI links Dr. Johnson to 1 more medical group.
Does Dr. Darryl C. Johnson accept Medicare?
Yes. CMS data shows Dr. Johnson billed Medicare for 336 services in 2024, and Dr. Johnson accepts Medicare assignment.
How many Medicare patients does Dr. Darryl C. Johnson see?
CMS counts 142 Medicare patients who saw Dr. Johnson in 2024, with an average age of 74.
What services does Dr. Darryl C. Johnson bill to Medicare?
In 2024, Dr. Johnson's most billed Medicare services were office visit, established patient (99212), office visit, new patient (99203) and office visit, established patient (99213).
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What drugs does Dr. Darryl C. Johnson prescribe most?
In 2024 Medicare Part D data, Dr. Johnson's most prescribed drugs by claims were Medroxyprogesterone Acetate, Oxybutynin Chloride ER and Mometasone Furoate.
Has Dr. Darryl C. Johnson received payments from drug or device companies?
CMS Open Payments shows $1,199 in general payments to Dr. Johnson from 23 companies from 2018 to 2024. The largest total came from Astellas Pharma US Inc.
How long has Dr. Darryl C. Johnson been practicing?
Dr. Johnson graduated from medical school in 1987, 39 years ago.
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