Dr. Donald Gratton Downs, MD
- Medicare services, 2024
- 533
- Medicare patients, 2024
- 111
- Part D claims, 2024
- 3,849
- Industry payments
- $995
- Medical group
- 1
- Practice address
- 2655 1st St, Simi Valley, CA 93065
- Practice phone
- Call (818) 837-5776
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Facey Endoscopy Center
Simi Valley, California
Find Dr. Downs' professional email, personal email and mobile number
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Dr. Donald Gratton Downs is a family medicine physician in Simi Valley, California
Dr. Downs practices at Facey Endoscopy Center in Simi Valley, California.
Dr. Downs' NPI, 1568451979, was assigned on October 18, 2005. Dr. Downs graduated from UC San Diego School of Medicine in 1986. Dr. Downs' California license number on file is G61850.
- NPI
- 1568451979NPI Registry (opens in a new tab)
- Medicare PAC ID
- 9739100306
- NPI enumeration date
- October 18, 2005
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (818) 837-5776
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 66
- Medical school graduation
- 1986
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Donald Gratton Downs practices at Facey Endoscopy Center in Simi Valley, California
Dr. Downs' primary practice is Facey Endoscopy Center, at 2655 1st St, Simi Valley, CA 93065 in Ventura County. The practice phone is (818) 837-5776.
- Facey Endoscopy Center2655 1st St, Simi Valley, CA 93065 · Ventura CountyPhone(818) 837-5776
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. Donald Gratton Downs is affiliated with 1 site of care and 1 medical group
Dr. Downs' primary practice is Facey Endoscopy Center in Simi Valley, California. The medical group on file is Facey Medical Group.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; and Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Dr. Donald Gratton Downs' practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Downs practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Facey Endoscopy Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Donald Gratton Downs is one of 15,680 family medicine physicians in California
Family medicine is Dr. Downs' primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Downs is board certified in family medicine by the American Board of Family Medicine. Dr. Downs has a license on file in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists ankle or foot injury, anxiety, arthritis, asthma, chronic anemia, chronic diabetes, chronic hypertension and chronic kidney disease among the conditions Dr. Downs treats.
Family medicine physicians near Dr. Downs
Counts of family medicine physicians 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. Donald Gratton Downs billed Medicare for 533 services in 2024
CMS data shows 533 Medicare services from Dr. Downs across 8 procedure codes in 2024, for 111 Medicare patients. Medicare paid $23,806 for them. Every service was in an office.
Dr. Downs' Medicare services by type, 2023 to 2024
- 2023
- 2024
- Office and hospital visits
- 2023: 1692024: 21527%
- Surgery
- 2023: 1392024: 16317%
- Other services
- 2023: 252024: 120380%
- Tests and treatments
- 2023: 222024: 3559%
Dr. Downs compared with the California median for family medicine physicians, 2024
- Dr. Downs
- California median
- Medicare services
- 533vs 2462.2 times
- Medicare patients
- 111vs 1186% below
- Part D claims
- 3,202vs 8333.8 times
Medians across 15,349 family medicine physicians in California with Dmand AI profiles that report each measure.
Dr. Downs' 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. Downs and other family medicine physicians in California.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. Donald Gratton Downs treated 111 Medicare patients in 2024, average age 72
CMS counts 111 Medicare patients who saw Dr. Downs in 2024. The largest group is 65 to 74, with 72 patients. 73% of them have high cholesterol, and 66% have high blood pressure. Their average risk score is 1.11, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Downs' median patient age at 64, with 38% women.
Dr. Downs' Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Downs' Medicare patients by sex, 2024
- Women4440%
- Men6760%
Chronic conditions among Dr. Downs' Medicare patients, 2024
- High cholesterol73%
- High blood pressure66%
- Arthritis37%
- Diabetes25%
- Chronic kidney disease23%
- Ischemic heart disease19%
- Mood disorders18%
- Anxiety16%
Share of Medicare patients with each condition. A patient can have several.
Dr. Downs' patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 64
Patient panel by sex, all payers
- Women38%
- Men60%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Donald Gratton Downs wrote 3,849 Medicare Part D claims in 2024
In 2024, Dr. Downs wrote 3,849 Medicare Part D claims for 268 patients. 88% of them were for generic drugs. CMS names the drug for 3,202 of them, across 80 drugs with 11 or more claims each, at $193,822 in total drug cost. In 2023, CMS named 3,079 claims across 80 drugs.
Dr. Downs' Part D claims by kind of drug, 2024
- Generic3,377 claims88%
- Brand-name439 claims11%
- Other33 claims1%
Dr. Downs' 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.
Drug classes CMS tracks in Dr. Downs' Part D claims, 2024
- Opioids5%174 of 3,849 claims
- Antibiotics2%94 of 3,849 claims
- Antipsychotics, patients 65 and over1%29 of 3,849 claims
Share of all Part D claims for each drug class CMS reports on. Classes with no claims are left out.
Part D claims for drugs CMS names, 2023 to 2024
- 2023
- 2024
- Claims for drugs CMS names
- 2023: 3,0792024: 3,2024%
Drugs named by CMS: 80 in 2024, 80 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. Donald Gratton Downs takes part in Medicare
Dr. Downs 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. Donald Gratton Downs received $995 in industry payments from 2016 to 2020
CMS Open Payments shows 62 general payments to Dr. Downs from 9 drug and device companies from 2016 to 2020. Food and beverage make up the largest share, 100% of the total. Pfizer Inc. paid the most, $397.
General payments to Dr. Downs by program year, 2016 to 2020
Companies that paid Dr. Downs the most, 2016 to 2020
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. Donald Gratton Downs graduated from UC San Diego School of Medicine
Dr. Downs graduated from UC San Diego School of Medicine in 1986.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Donald Gratton Downs accepts plans from 13 insurance carriers
Dr. Downs is in network with 13 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
- Aetna
- United Healthcare
- Blue Cross Blue Shield of Michigan
- Blue Cross Blue Shield of Massachusetts
- Elevance
- HCSC
- Regence Health Plans
- Alliant Health Plans
- +5 more carriersWith a free account
Plan types Dr. Downs accepts, by number of carriers
- PPO9
- Medicare7
- HMO5
- POS4
- EPO3
Source: Dmand AI Insurance Network Data
Sources for Dr. Donald Gratton Downs'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) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| Insurance carriers and plan types | Dmand AI Insurance Network 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. Donald Gratton Downs
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. Donald Gratton Downs' NPI number?
Dr. Donald Gratton Downs' NPI number is 1568451979. It was assigned on October 18, 2005, and it is active in the NPI Registry.
What kind of doctor is Dr. Donald Gratton Downs?
Dr. Donald Gratton Downs is a family medicine physician in Simi Valley, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Donald Gratton Downs practice?
Dr. Downs practices at 2655 1st St, Simi Valley, CA 93065. Dr. Downs' primary practice is Facey Endoscopy Center in Simi Valley, California.
What is Dr. Donald Gratton Downs' office phone number?
The practice phone on file for Dr. Downs is (818) 837-5776.
What is Dr. Donald Gratton Downs' medical license number?
Dr. Downs' California license number on file is G61850.
What medical group is Dr. Donald Gratton Downs part of?
Dr. Downs is linked to Facey Medical Group.
Does Dr. Donald Gratton Downs accept Medicare?
Yes. CMS data shows Dr. Downs billed Medicare for 533 services in 2024, and Dr. Downs accepts Medicare assignment.
How many Medicare patients does Dr. Donald Gratton Downs see?
CMS counts 111 Medicare patients who saw Dr. Downs in 2024, with an average age of 72.
Is Dr. Donald Gratton Downs board certified?
Yes. Dr. Downs is board certified in family medicine by the American Board of Family Medicine.
What services does Dr. Donald Gratton Downs bill to Medicare?
In 2024, Dr. Downs' most billed Medicare services were surgery: heart and blood vessels (36415), office visit, established patient (99214) and office visit, established patient (99213).
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Where did Dr. Donald Gratton Downs go to medical school?
Dr. Downs graduated from UC San Diego School of Medicine in 1986.
What drugs does Dr. Donald Gratton Downs prescribe most?
In 2024 Medicare Part D data, Dr. Downs' most prescribed drugs by claims were Atorvastatin Calcium, Losartan Potassium and Lisinopril.
Has Dr. Donald Gratton Downs received payments from drug or device companies?
CMS Open Payments shows $995 in general payments to Dr. Downs from 9 companies from 2016 to 2020. The largest total came from Pfizer Inc.
How long has Dr. Donald Gratton Downs been practicing?
Dr. Downs graduated from medical school in 1986, 40 years ago.
What insurance does Dr. Donald Gratton Downs accept?
Dr. Downs is in network with 13 carriers, including Aetna, United Healthcare and Blue Cross Blue Shield of Michigan. PPO plans come from the most carriers, 9. Check the plan with the practice before a visit.
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