Katherine G. Ruiz-Mellott, M.D.,MPH
Psychiatry Physician · Haverhill, MA
Katherine G. Ruiz-Mellott, M.D.,MPH is a psychiatry physician with a practice address in Haverhill, Massachusetts, and NPI 1962516864, issued on Aug 18, 2006. Check the license (Massachusetts 227275, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Katherine G. Ruiz-Mellott
- Credential
- M.D.,MPH
- Primary taxonomy
- Psychiatry Physician 2084P0800X
- License number
- 227275 MA
Self-reported in NPPES; status is on the state search - Practice location
- 76 Summer Street, Haverhill, MA 01830
- Phone
- (978) 556-6229
- Enumerated
- Aug 18, 2006
- Record last updated
- Sep 21, 2009 (not updated in 17 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20070802000606); accepts Medicare assignment
- Medical or professional school
- University Of Illinois College Of Med (Chi/Peor/Rock/Chm-Urb), 1998
- Entity
- Type 1 · individual
8 nearest psychiatry physician records → All 2,736 in Massachusetts → Look up another NPI →
Verify Katherine G. Ruiz-Mellott in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 227275Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
81% fewer Medicare Part D claims than the average psychiatry physician in 2024
188 Medicare Part D claims for 41 beneficiaries, against an average of 1,000 among the 35,054 providers of this specialty who prescribed in Part D.
Most prescribed
- Olanzapine16 claims
- Quetiapine Fumarate12 claims
- Hydroxyzine Pamoate11 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: $22.47
1 payment: food and beverage; the largest payer was Indivior Inc. The 13,693 providers of this specialty with any payment received $4,954.93 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
- First Psychiatric Planners, IncChestnut Hill, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Katherine G. Ruiz-Mellott among 2,736 psychiatry physician records in Massachusetts
Katherine G. Ruiz-Mellott, M.D.,MPH is one of 2,736 psychiatry physician records with a practice address in Massachusetts. 65% 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 10% of them.
- NPI issued2006 · 10% of these records are older, 51% newer
- In a Medicare fileYes · 65% of these records are
- In the CMS Doctors and Clinicians fileYes · 45% of these records are
- Graduated1998 · median 2005 among the 1,219 with a school on file
- Record last updated2009 · 62% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 2084P0800X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Psychiatry Physician providers in Massachusetts
There are 2,736 psychiatry physician records in Massachusetts.
All 2,736 in Massachusetts → Every provider in Haverhill → Psychiatry Physician nationwide →
The 8 psychiatry physician records with the nearest ZIP codes
- Maria Gaticales, MDHaverhill, MA 018301205883931
- Kai Hayes, MDHaverhill, MA 018301063403921
- Chitra Malur, M.D.Haverhill, MA 018301457493702
- Richard Cooper, M.D.Georgetown, MA 018331154361681
- Leo Shapiro, M.D.Georgetown, MA 018331598849358
- Chand Bhan, MDChelmsford, MA 018241205812112
- Ricardo Dancel, MDChelmsford, MA 018241164520631
- James Harburger, MDChelmsford, MA 018241245284819
Common questions
What is Katherine G. Ruiz-Mellott, M.D.,MPH's NPI number?
Katherine G. Ruiz-Mellott, M.D.,MPH's National Provider Identifier (NPI) is 1962516864, issued on Aug 18, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Katherine G. Ruiz-Mellott, M.D.,MPH located?
The NPPES record lists a practice address at 76 Summer Street, Haverhill, MA, 01830. Phone: (978) 556-6229. Providers update this record themselves, so call before visiting.
How can I verify Katherine G. Ruiz-Mellott, M.D.,MPH's license?
NPPES lists Massachusetts license number 227275, 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 Katherine G. Ruiz-Mellott, M.D.,MPH prescribe under Medicare Part D?
In 2024, Katherine G. Ruiz-Mellott, M.D.,MPH had 188 Medicare Part D claims for 41 beneficiaries; the average among psychiatry physician prescribers was 1,000. 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.