Dr. Jonathan Parker, MD
- Medicare patients, 2024
- 11
- Part D claims, 2024
- 8,099
- Hospital affiliations
- 1
- Medical group
- 1
- Insurance carriers
- 2
- Practice address
- 9961 Sierra Ave, Fontana, CA 92335
- Practice phone
- Call (909) 427-5000
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Find Dr. Parker'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. Jonathan Parker is a family medicine physician in Fontana, California
Dr. Parker practices at Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
Dr. Parker's NPI, 1699114504, was assigned on June 24, 2013. Dr. Parker graduated from David Geffen School of Medicine at UCLA in 2013. Dr. Parker holds California license A135965.
- NPI
- 1699114504NPI Registry (opens in a new tab)
- Medicare PAC ID
- 5092024554
- NPI enumeration date
- June 24, 2013
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (909) 427-5000
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 39
- Medical school graduation
- 2013
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. Jonathan Parker practices at Fontana Medical Center in Fontana, California
Dr. Parker's primary practice is Fontana Medical Center, at 9961 Sierra Ave, Fontana, CA 92335 in San Bernardino County. The practice phone is (909) 427-5000.
- Fontana Medical Center9961 Sierra Ave, Fontana, CA 92335 · San Bernardino CountyPhone(909) 427-5000
Source: Dmand AI Affiliation Data
Dr. Jonathan Parker is affiliated with 1 site of care and 1 medical group
Dr. Parker's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente. The medical group on file is Southern California Permanente Medical Group.
Sources: Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. Jonathan Parker's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Parker practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Fontana Medical Center | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. Jonathan Parker is one of 15,680 family medicine physicians in California
Family medicine is Dr. Parker's primary specialty in the NPI Registry, under taxonomy code 207Q00000X. Dr. Parker is board certified in family medicine by the American Board of Family Medicine. Dr. Parker is licensed in California.
Specialties and state licenses
- Family medicine, CaliforniaPrimary
Clinical focus
Dmand AI lists chronic diabetes, chronic hypertension and epilepsy among the conditions Dr. Parker treats.
Family medicine physicians near Dr. Parker
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. Jonathan Parker treated 11 Medicare patients in 2024, average age 62
CMS counts 11 Medicare patients who saw Dr. Parker in 2024. The largest group is 75 to 84, with 0 patients. Their average risk score is 1.34, where 1.00 is the Medicare average.
Across all payers, Dmand AI patient panel data puts Dr. Parker's median patient age at 51, with 58% women.
Dr. Parker's Medicare patients by age, 2024
CMS leaves out age groups with fewer than 11 patients.
Dr. Parker's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 51
Patient panel by sex, all payers
- Women58%
- Men41%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
Dr. Jonathan Parker wrote 8,099 Medicare Part D claims in 2024
In 2024, Dr. Parker wrote 8,099 Medicare Part D claims for 1,245 patients. 88% of them were for generic drugs. CMS names the drug for 7,479 of them, across 105 drugs with 11 or more claims each, at $358,428 in total drug cost. In 2023, CMS named 7,438 claims across 101 drugs.
Dr. Parker's Part D claims by kind of drug, 2024
- Generic7,119 claims88%
- Brand-name836 claims10%
- Other144 claims2%
Dr. Parker'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.
Drug classes CMS tracks in Dr. Parker's Part D claims, 2024
- Opioids5%390 of 8,099 claims
- Antibiotics2%136 of 8,099 claims
- Antipsychotics, patients 65 and over0%13 of 8,099 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: 7,4382024: 7,4791%
Drugs named by CMS: 105 in 2024, 101 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. Jonathan Parker takes part in Medicare
Dr. Parker 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. Jonathan Parker graduated from David Geffen School of Medicine at UCLA
Dr. Parker graduated from David Geffen School of Medicine at UCLA in 2013.
- Medical school
- Board certified in family medicine
Source: Dmand AI Professional Profile Data
Dr. Jonathan Parker accepts plans from 2 insurance carriers
Dr. Parker is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
- Kaiser Permanente
- CMS Medicare
Plan types Dr. Parker accepts, by number of carriers
- EPO1
- HMO1
- Medicare1
- POS1
Source: Dmand AI Insurance Network Data
Sources for Dr. Jonathan Parker'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 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) |
| 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. Jonathan Parker
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. Jonathan Parker's NPI number?
Dr. Jonathan Parker's NPI number is 1699114504. It was assigned on June 24, 2013, and it is active in the NPI Registry.
What kind of doctor is Dr. Jonathan Parker?
Dr. Jonathan Parker is a family medicine physician in Fontana, California. The primary specialty in the NPI Registry is Family Medicine Physician (taxonomy code 207Q00000X).
Where does Dr. Jonathan Parker practice?
Dr. Parker practices at 9961 Sierra Ave, Fontana, CA 92335. Dr. Parker's primary practice is Fontana Medical Center in Fontana, California, part of Kaiser Permanente.
What is Dr. Jonathan Parker's office phone number?
The practice phone on file for Dr. Parker is (909) 427-5000.
What is Dr. Jonathan Parker's medical license number?
Dr. Parker holds California license A135965.
Which hospitals is Dr. Jonathan Parker affiliated with?
Dr. Parker practices at Fontana Medical Center in Fontana, California.
What medical group is Dr. Jonathan Parker part of?
Dr. Parker is linked to Southern California Permanente Medical Group.
Does Dr. Jonathan Parker accept Medicare?
Yes. CMS lists Dr. Parker as accepting Medicare assignment.
How many Medicare patients does Dr. Jonathan Parker see?
CMS counts 11 Medicare patients who saw Dr. Parker in 2024, with an average age of 62.
Is Dr. Jonathan Parker board certified?
Yes. Dr. Parker is board certified in family medicine by the American Board of Family Medicine.
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Where did Dr. Jonathan Parker go to medical school?
Dr. Parker graduated from David Geffen School of Medicine at UCLA in 2013.
What drugs does Dr. Jonathan Parker prescribe most?
In 2024 Medicare Part D data, Dr. Parker's most prescribed drugs by claims were Atorvastatin Calcium, Lisinopril and Amlodipine Besylate.
How long has Dr. Jonathan Parker been practicing?
Dr. Parker graduated from medical school in 2013, 13 years ago.
What insurance does Dr. Jonathan Parker accept?
Dr. Parker is in network with 2 carriers, including Kaiser Permanente and CMS Medicare. EPO plans come from the most carriers, 1. Check the plan with the practice before a visit.
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