Henry John Merola, M.D.
Internal Medicine Physician · Waltham, MA
Henry John Merola, M.D. is an internal medicine physician with a practice address in Waltham, Massachusetts, and NPI 1902963986, issued on Jan 2, 2007. Check the license (Massachusetts 59659, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Henry John Merola
- Credential
- M.D.
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 59659 MA
Self-reported in NPPES; status is on the state search - Practice location
- 32 South St, Waltham, MA 02453
- Phone
- (781) 894-8200
- Enumerated
- Jan 2, 2007
- Record last updated
- Mar 7, 2023
- Fax
- (781) 894-8202
- Medicaid ID
- 3145221 MA
- Medicare enrollment
- Enrolled (PECOS I20050602000645); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 6,825 in Massachusetts → Look up another NPI →
Also registered at 32 South St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Henry John Merola in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 59659Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.2 times the Medicare Part D claims of the average internal medicine physician in 2024
6,829 Medicare Part D claims for 431 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 123 claims were for opioids.
Most prescribed
- Atorvastatin Calcium469 claims
- Gabapentin266 claims
- Levothyroxine Sodium224 claims
- Metoprolol Succinate217 claims
- Clonazepam204 claims
- Metformin Hcl175 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.
Industry payments in 2024: $509.05
32 payments; by number, the most common kind was food and beverage; the largest payer was AstraZeneca Pharmaceuticals LP. The 50,334 providers of this specialty with any payment received $1,303.06 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 2 group practices
- Revere Medical OF Massachusetts PCWaltham, MA
- Steward Medical Group IncWaltham, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Henry John Merola among 6,825 internal medicine physician records in Massachusetts
Henry John Merola, M.D. is one of 6,825 internal medicine physician records with a practice address in Massachusetts. 75% 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 46% of them.
- NPI issued2007 · 46% of these records are older, 45% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated1985 · median 2004 among the 4,103 with a school on file
- Record last updated2023 · 64% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
32 internal medicine physician records list a practice address in Waltham
They are 32 of the 2,111 NPPES records with a practice address in Waltham, and 6,825 internal medicine physician records in Massachusetts.
All 6,825 in Massachusetts → Every provider in Waltham → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Denise Basow, M.D.Waltham, MA 024531609883255
- Edward Busick, M.D.Waltham, MA 024531467436931
- Rebecca Connor, M.D.Waltham, MA 024531598880379
- Barry Ehrlich, M.D.Waltham, MA 024531710934047
- Daniel Horn, MDWaltham, MA 024531780903971
- Wissam Khoory, M.D.Waltham, MA 024531013962430
- Mark Shankman, MDWaltham, MA 024531629028709
- Hadia Tirmizi, M.D.Waltham, MA 024531235124249
Common questions
What is Henry John Merola, M.D.'s NPI number?
Henry John Merola, M.D.'s National Provider Identifier (NPI) is 1902963986, issued on Jan 2, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Henry John Merola, M.D. located?
The NPPES record lists a practice address at 32 South St, Waltham, MA, 02453. Phone: (781) 894-8200. Providers update this record themselves, so call before visiting.
How can I verify Henry John Merola, M.D.'s license?
NPPES lists Massachusetts license number 59659, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://findmydoctor.mass.gov/. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Henry John Merola, M.D. prescribe under Medicare Part D?
In 2024, Henry John Merola, M.D. had 6,829 Medicare Part D claims for 431 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.