William Loftin Petersen, O.D.
Optometrist · Dana Point, CA
William Loftin Petersen, O.D. is an optometrist with a practice address in Dana Point, California, and NPI 1477690105, issued on Jan 31, 2007. Check the license (California 7031 T, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- William Loftin Petersen
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 7031 T CA
Self-reported in NPPES; status is on the state search - Practice location
- 34179 Golden Lantern St, Dana Point, CA 92629
- Phone
- (949) 661-1181
- Enumerated
- Jan 31, 2007
- Record last updated
- Jun 7, 2017 (not updated in 9 years: call before relying on the address or phone)
- Fax
- (949) 661-8892
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Verify William Loftin Petersen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 7031 TCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
91% fewer Medicare Part D claims than the average optometrist in 2024
25 Medicare Part D claims for 12 beneficiaries, against an average of 277 among the 33,128 providers of this specialty who prescribed in Part D.
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.
William Loftin Petersen among 8,308 optometrist records in California
William Loftin Petersen, O.D. is one of 8,308 optometrist records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2007, is newer than 34% of them.
- NPI issued2007 · 34% of these records are older, 46% newer
- In a Medicare fileYes · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2017 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Optometrist providers in California
There are 8,308 optometrist records in California.
All 8,308 in California → Every provider in Dana Point → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Natalie Karlinsey, ODMonarch Beach, CA 926291205520236
- Irene Lin-Dilorinzo, O.D.Dana Point, CA 926291649234154
- John Spaeth, O.D.Dana Point, CA 926291508835919
- Bruce Wagner, ODMonarch Beach, CA 926291053434035
- Cheryl Alderson, O.D.Lake Forest, CA 926301366521809
- Jacqueline Cullinane, ODLake Forest, CA 926301689645046
- John Deguzman Celis, O.D.Lake Forest, CA 926301861542714
- Charles Dominguez, O.D.Lake Forest, CA 926301063437507
Common questions
What is William Loftin Petersen, O.D.'s NPI number?
William Loftin Petersen, O.D.'s National Provider Identifier (NPI) is 1477690105, issued on Jan 31, 2007. An NPI identifies a provider in billing; it is not a license.
Where is William Loftin Petersen, O.D. located?
The NPPES record lists a practice address at 34179 Golden Lantern St, Dana Point, CA, 92629. Phone: (949) 661-1181. Providers update this record themselves, so call before visiting.
How can I verify William Loftin Petersen, O.D.'s license?
NPPES lists California license number 7031 T, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does William Loftin Petersen, O.D. prescribe under Medicare Part D?
In 2024, William Loftin Petersen, O.D. had 25 Medicare Part D claims for 12 beneficiaries; the average among optometrist prescribers was 277. 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.