Marianne Valesky Delach, D.O.
Obstetrics & Gynecology Physician · Watertown, MA
Marianne Valesky Delach, D.O. is an obstetrics & gynecology physician with a practice address in Watertown, Massachusetts, and NPI 1831385483, issued on Sep 18, 2007. Check the license (Massachusetts 244075, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Marianne Valesky Delach
- Credential
- D.O.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 244075 MA
Self-reported in NPPES; status is on the state search - Practice location
- 485 Arsenal St, Watertown, MA 02472
- Phone
- (617) 972-5500
- Enumerated
- Sep 18, 2007
- Record last updated
- Jan 22, 2013 (not updated in 13 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20100924000326); accepts Medicare assignment
- Medical or professional school
- University Of New England, College Of Osteo Medicine, 2006
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 1,127 in Massachusetts → Look up another NPI →
Also registered at 485 Arsenal St
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jennifer Allen, PHARMD, CDCES, BCACPAmbulatory Care Pharmacist1285890566
- Nicole Allie, PHARMD, CGPGeriatric Pharmacist1104933936
- Ehsan Azimi, M.D.Internal Medicine Physician1437475829
- Olivia Bass, NPFamily Nurse Practitioner1669209664
- Mark Bauer, M.D.Internal Medicine Physician1487625307
- Edward Bauman, PSYDPsychologist1174575674
Verify Marianne Valesky Delach in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 244075Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
48% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
85 Medicare Part D claims for 30 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D. Brand-name drugs were 24% of claims.
Most prescribed
- Estradiol20 claims
- Progesterone12 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: $103.28
5 payments; by number, the most common kind was food and beverage; the largest payer was Bayer Healthcare Pharmaceuticals Inc. The 21,429 providers of this specialty with any payment received $1,030.61 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
- Mount Auburn Professional Services IncCambridge, MA
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Marianne Valesky Delach among 1,127 obstetrics & gynecology physician records in Massachusetts
Marianne Valesky Delach, D.O. is one of 1,127 obstetrics & gynecology physician records with a practice address in Massachusetts. 73% 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 50% of them.
- NPI issued2007 · 50% of these records are older, 39% newer
- In a Medicare fileYes · 73% of these records are
- In the CMS Doctors and Clinicians fileYes · 64% of these records are
- Graduated2006 · median 2004 among the 715 with a school on file
- Record last updated2013 · 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 207V00000X and a Massachusetts practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Massachusetts
There are 1,127 obstetrics & gynecology physician records in Massachusetts.
All 1,127 in Massachusetts → Every provider in Watertown → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- L'Tricia Chery, M.D.Watertown, MA 024721912026410
- Rosana Chow, MDWatertown, MA 024721376514588
- Leslie Macdonald, MDWatertown, MA 024721376514562
- Brianne Mahoney, M.D.Watertown, MA 024721881892701
- Brian Price, M.D.Watertown, MA 024721851307284
- Cecilia Bahamon, MDChestnut Hill, MA 024671700306651
- Erik Clinton, M.D.Chestnut Hill, MA 024671013127869
- Mary Louise FowlerChestnut Hill, MA 024671700380045
Common questions
What is Marianne Valesky Delach, D.O.'s NPI number?
Marianne Valesky Delach, D.O.'s National Provider Identifier (NPI) is 1831385483, issued on Sep 18, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Marianne Valesky Delach, D.O. located?
The NPPES record lists a practice address at 485 Arsenal St, Watertown, MA, 02472. Phone: (617) 972-5500. Providers update this record themselves, so call before visiting.
How can I verify Marianne Valesky Delach, D.O.'s license?
NPPES lists Massachusetts license number 244075, 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 Marianne Valesky Delach, D.O. prescribe under Medicare Part D?
In 2024, Marianne Valesky Delach, D.O. had 85 Medicare Part D claims for 30 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.