John Robert Grossman, DDS
General Practice Dentistry · Corona, CA
John Robert Grossman, DDS is a general practice dentistry with a practice address in Corona, California, and NPI 1538214846, issued on Jan 24, 2007. Check the license (California D41413, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- John Robert Grossman
- Credential
- DDS
- Primary taxonomy
- General Practice Dentistry 1223G0001X
- License number
- D41413 CA
Self-reported in NPPES; status is on the state search - Practice location
- 27569 Hopi Springs CT, Corona, CA 92883
- Phone
- (951) 674-2720
- Enumerated
- Jan 24, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (951) 674-9938
- Entity
- Type 1 · individual
8 nearest general practice dentistry records → All 17,852 in California → Look up another NPI →
Verify John Robert Grossman in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license D41413Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
73% fewer Medicare Part D claims than the average general practice dentistry in 2024
22 Medicare Part D claims for 15 beneficiaries, against an average of 83 among the 70,290 providers of this specialty who prescribed in Part D. Brand-name drugs were 0% of claims.
Most prescribed
- Amoxicillin13 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.
John Robert Grossman among 17,852 general practice dentistry records in California
John Robert Grossman, DDS is one of 17,852 general practice dentistry records with a practice address in California. 57% 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 29% of them.
- NPI issued2007 · 29% of these records are older, 40% newer
- In a Medicare fileYes · 57% of these records are
- In the CMS Doctors and Clinicians fileNo · under 1% of these records are
- Record last updated2007 · 79% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 1223G0001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
77 general practice dentistry records list a practice address in Corona
They are 77 of the 3,731 NPPES records with a practice address in Corona, and 17,852 general practice dentistry records in California.
All 17,852 in California → Every provider in Corona → General Practice Dentistry nationwide →
The 8 general practice dentistry records with the nearest ZIP codes
- Esther Lee, DMDCorona, CA 928831356694442
- George Nguyen, DDSCorona, CA 928831336297654
- Chi Nguyen, DDSCorona, CA 928831548452626
- Emily Nguyen, DDSCorona, CA 928831124542337
- Philip Chang, D.D.S.Corona, CA 928821205265527
- Ethel Cruz, D.M.D.Corona, CA 928821316110711
- Ivette Guevara Garcia, DDSCorona, CA 928821265367114
- Jason JooCorona, CA 928821548646854
Common questions
What is John Robert Grossman, DDS's NPI number?
John Robert Grossman, DDS's National Provider Identifier (NPI) is 1538214846, issued on Jan 24, 2007. An NPI identifies a provider in billing; it is not a license.
Where is John Robert Grossman, DDS located?
The NPPES record lists a practice address at 27569 Hopi Springs CT, Corona, CA, 92883. Phone: (951) 674-2720. Providers update this record themselves, so call before visiting.
How can I verify John Robert Grossman, DDS's license?
NPPES lists California license number D41413, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
How much does John Robert Grossman, DDS prescribe under Medicare Part D?
In 2024, John Robert Grossman, DDS had 22 Medicare Part D claims for 15 beneficiaries; the average among general practice dentistry prescribers was 83. 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.