John Hadley, M.D.
Pulmonary Disease Physician · Concord, CA
John Hadley, M.D. is a pulmonary disease physician with a practice address in Concord, California, and NPI 1750392437, issued on Aug 10, 2006. Check the license (California G40172, as entered in NPPES) on the Medical Board of California; the Medicare figures below come from public CMS files.
- Name
- John Hadley
- Credential
- M.D.
- Primary taxonomy
- Pulmonary Disease Physician 207RP1001X
- License number
- G40172 CA
Self-reported in NPPES; status is on the state search - Practice location
- 2299 Bacon St, Concord, CA 94520
- Phone
- (925) 676-2942
- Enumerated
- Aug 10, 2006
- Record last updated
- Mar 28, 2013 (not updated in 13 years: call before relying on the address or phone)
- Fax
- (925) 676-7108
- Medicaid IDs
- 00G401720 CA
GR0064710 CA - Medicare enrollment
- Enrolled (PECOS I20050609000856); accepts Medicare assignment
- Medical or professional school
- Clvlnd Clinic Lerner College Of Med Of Case Wstn Rsv University, 1978
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest pulmonary disease physician records → All 1,443 in California → Look up another NPI →
Also registered at 2299 Bacon St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Marie-Claire Barnaba, NPNurse Practitioner1518018696
- Sloane Blair, CPNP-PCPediatric Nurse Practitioner1568917540
- Elizabeth Gumas, NPNurse Practitioner1801843792
- Sara Huerta, ARNPNurse Practitioner1740204213
- Hiromi Takekuma, D.O.Pulmonary Disease Physician1275544389
- Lucia Yang, M.D.Specialist1407890205
Verify John Hadley in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMedical Board of California
Search for license G40172Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
56% more Medicare Part D claims than the average pulmonary disease physician in 2024
2,223 Medicare Part D claims for 294 beneficiaries, against an average of 1,425 among the 11,596 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims. 17 claims were for opioids.
Most prescribed
- Pantoprazole Sodium396 claims
- Famotidine367 claims
- Albuterol Sulfate Hfa234 claims
- Prednisone141 claims
- Trelegy Ellipta127 claims
- Montelukast Sodium86 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.
The practice group's MIPS final score for 2023 (Medicare payment program): 99 of 100
The Merit-based Incentive Payment System score is reported for the practice group, not for one clinician alone. Four categories are weighted into the final score; the average among 454,083 clinicians with a measured score was 83.5.
Source: CMS Quality Payment Program, MIPS performance year 2023, group reporting; category weights for 2023 (qpp.cms.gov).
Industry payments in 2024: $1,370.52
55 payments; by number, the most common kind was food and beverage; the largest payer was Boehringer Ingelheim Pharmaceuticals, Inc. The 8,806 providers of this specialty with any payment received $5,159.88 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.
Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.
Bills Medicare through one group practice
- Diablo Pulmonary Medical Group IncConcord, CA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Hadley among 1,443 pulmonary disease physician records in California
John Hadley, M.D. is one of 1,443 pulmonary disease physician records with a practice address in California. 84% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2006, is newer than 7% of them.
- NPI issued2006 · 7% of these records are older, 51% newer
- In a Medicare fileYes · 84% of these records are
- In the CMS Doctors and Clinicians fileYes · 74% of these records are
- Graduated1978 · median 2002 among the 1,061 with a school on file
- Record last updated2013 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207RP1001X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Pulmonary Disease Physician providers in California
There are 1,443 pulmonary disease physician records in California.
All 1,443 in California → Every provider in Concord → Pulmonary Disease Physician nationwide →
The 8 pulmonary disease physician records with the nearest ZIP codes
- Richard Kops, M.D.Concord, CA 945201871504530
- Minh Nguyen, MDConcord, CA 945201750563029
- David Safianoff, M.D.Concord, CA 945201396756060
- Hiromi Takekuma, D.O.Concord, CA 945201275544389
- Donald Doyle, MDFairfield, CA 945331699766220
- David Carlson, MDTravis Afb, CA 945351043292238
- Katherine Dittman, DOFairfield, CA 945351316486129
- Rocky Fox, DOTravis Afb, CA 945351346746914
Common questions
What is John Hadley, M.D.'s NPI number?
John Hadley, M.D.'s National Provider Identifier (NPI) is 1750392437, issued on Aug 10, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Hadley, M.D. located?
The NPPES record lists a practice address at 2299 Bacon St, Concord, CA, 94520. Phone: (925) 676-2942. Providers update this record themselves, so call before visiting.
How can I verify John Hadley, M.D.'s license?
NPPES lists California license number G40172, 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 John Hadley, M.D. prescribe under Medicare Part D?
In 2024, John Hadley, M.D. had 2,223 Medicare Part D claims for 294 beneficiaries; the average among pulmonary disease physician prescribers was 1,425. Part D covers Medicare prescriptions only.
What is John Hadley, M.D.'s MIPS final score?
The 2023 MIPS final score is 99 of 100, reported for the practice group. The average among 454,083 clinicians with a measured score was 83.5.
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.