Ronald J. Field, M.D.
Pediatrics Physician · Paso Robles, CA
Ronald J. Field, M.D. is a pediatrics physician with a practice address in Paso Robles, California, and NPI 1427034602, issued on Dec 19, 2005. Check the license (California G23915, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- Ronald J. Field
- Credential
- M.D.
- Primary taxonomy
- Pediatrics Physician 208000000X
- License number
- G23915 CA
Self-reported in NPPES; status is on the state search - Practice location
- 1108 Vine St, Paso Robles, CA 93446
- Phone
- (805) 239-4222
- Enumerated
- Dec 19, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (805) 239-4832
- Entity
- Type 1 · individual
8 nearest pediatrics physician records → All 9,272 in California → Look up another NPI →
Verify Ronald J. Field in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G23915Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
96% fewer Medicare Part D claims than the average pediatrics physician in 2024
14 Medicare Part D claims, against an average of 375 among the 5,609 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Ronald J. Field among 9,272 pediatrics physician records in California
Ronald J. Field, M.D. is one of 9,272 pediatrics physician records with a practice address in California. 31% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 96% newer
- In a Medicare fileYes · 31% of these records are
- In the CMS Doctors and Clinicians fileNo · 8% of these records are
- Record last updated2007 · 65% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 208000000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 pediatrics physician records list a practice address in Paso Robles
They are 6 of the 382 NPPES records with a practice address in Paso Robles, and 9,272 pediatrics physician records in California.
All 9,272 in California → Every provider in Paso Robles → Pediatrics Physician nationwide →
The 8 pediatrics physician records with the nearest ZIP codes
- Boruch GoldsteinPaso Robles, CA 934461164041265
- Deborah Kronstad, M.D.Paso Robles, CA 934461972797637
- James McGhee, MDPaso Robles, CA 934461003910019
- Marylin Ricardo-Ortiz, MDPaso Robles, CA 934461124059225
- Pablo Yepez Bracamonte, MDPaso Robles, CA 934461295265858
- Patti Hamernik, M.D.Nipomo, CA 934441043238454
- Claire Tarantino, M.D.Nipomo, CA 934441629096235
- Jonathan Finlay, MDPismo Beach, CA 934491427196757
Common questions
What is Ronald J. Field, M.D.'s NPI number?
Ronald J. Field, M.D.'s National Provider Identifier (NPI) is 1427034602, issued on Dec 19, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Ronald J. Field, M.D. located?
The NPPES record lists a practice address at 1108 Vine St, Paso Robles, CA, 93446. Phone: (805) 239-4222. Providers update this record themselves, so call before visiting.
How can I verify Ronald J. Field, M.D.'s license?
NPPES lists California license number G23915, as entered by the provider. Search the Medical Board of California at https://www.mbc.ca.gov/License-Verification/default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Ronald J. Field, M.D. prescribe under Medicare Part D?
In 2024, Ronald J. Field, M.D. had 14 Medicare Part D claims; the average among pediatrics physician prescribers was 375. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.