Mary Chang, D.O.
Obstetrics Physician · Haverhill, MA
Mary Chang, D.O. is an obstetrics physician with a practice address in Haverhill, Massachusetts, and NPI 1407870389, issued on Jul 26, 2006. Check the license (Massachusetts 243524, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the Medicare figures below come from public CMS files.
- Name
- Mary Chang
- Credential
- D.O.
- Primary taxonomy
- Obstetrics Physician 207VX0000X
- License numbers
- 243524 MA
K1390 TX
Self-reported in NPPES; status is on the state search - Practice location
- 600 Primrose St Ste 202, Haverhill, MA 01830
- Phone
- (978) 556-1000
- Enumerated
- Jul 26, 2006
- Entity
- Type 1 · individual
Also registered at 600 Primrose St Ste 202
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Kathleen Absalom, N.P.Licensed Practical Nurse1841303963
- Alda Andoni, MDObstetrics & Gynecology Physician1962820704
- Rebecca Boyer, MDObstetrics & Gynecology Physician1992780241
- Patricia Kellogg, NPWomen's Health Nurse Practitioner1962543793
- Jane Kerr-Fernandez, MDObstetrics & Gynecology Physician1295732279
- Steven Mollov, MDObstetrics & Gynecology Physician1295732287
Verify Mary Chang in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 243524Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
88% fewer Medicare Part D claims than the average obstetrics physician in 2024
41 Medicare Part D claims for 21 beneficiaries, against an average of 331 among the 868 providers of this specialty who prescribed in Part D.
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.
Obstetrics Physician providers in Massachusetts
There are 27 obstetrics physician records in Massachusetts.
Other obstetrics physician records in Massachusetts
- Mohamed Ali, M.D.Fall River, MA1124122270
- Patricia Aronson, M.D.Worcester, MA1710978085
- Alexandra Belcher-Obejero-Paz, M.D., M.P.H.Boston, MA1952798704
- Peter Brown, MDPembroke, MA1942249214
- Amy Coe, ARNPBoston, MA1851478051
- Ai-Ris Collier, M.D.Boston, MA1750675351
- Robert DalessandroLeominster, MA1295967669
- Debra Disandro, M.D.Springfield, MA1043219397
- Rachel Flynn, CNMBoston, MA1093865750
- Jonathan Friedes, MDBoston, MA1780606160
Common questions
What is Mary Chang, D.O.'s NPI number?
Mary Chang, D.O.'s National Provider Identifier (NPI) is 1407870389, issued on Jul 26, 2006. An NPI identifies a provider in billing; it is not a license.
Where is Mary Chang, D.O. located?
The NPPES record lists a practice address at 600 Primrose St Ste 202, Haverhill, MA, 01830. Phone: (978) 556-1000. Providers update this record themselves, so call before visiting.
How can I verify Mary Chang, D.O.'s license?
NPPES lists Massachusetts license number 243524, as entered by the provider. Search the Massachusetts Board of Registration in Medicine at https://www.mass.gov/orgs/board-of-registration-in-medicine. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does Mary Chang, D.O. prescribe under Medicare Part D?
In 2024, Mary Chang, D.O. had 41 Medicare Part D claims for 21 beneficiaries; the average among obstetrics physician prescribers was 331. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 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.
Every figure on PlainDoctor is rendered directly from the federal CMS NPPES registry, Medicare Part D, MIPS, and Open Payments records, no number is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 27, 2026.