Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Heidi W Ashih, M.D., PH.D., M.S.
Psychiatry Physician in Boston, MA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1699978734
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Registry record
Entity type Individual (Type 1)
Name Dr. Heidi W Ashih
Credential M.D., PH.D., M.S.
Sex Female
Practice address 1 Bowdoin Sq, 6th Floor, Boston, MA, 02114
Phone (617) 724-7741
Fax (617) 724-3028
Enumeration date Jun 6, 2007
Last updated in NPPES Jul 24, 2012
Taxonomy & licenses
MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure.
About the MD credential
What is an NPI number?
A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.
Frequently asked questions
What specialty is Heidi Ashih?
Heidi Ashih is registered in NPPES with the primary taxonomy of Psychiatry Physician. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.
Is this the official NPI registry?
No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.
Other providers at this practice address
Browse all → Timothy Petersen Psychologist · Boston, MA NPI 1295737898 John Fromson Psychiatry Physician · Boston, MA NPI 1083695464 Steven Zeitels Otolaryngology Physician · Boston, MA NPI 1538145735 Robert Hillman Speech-Language Pathologist · Boston, MA NPI 1700904976 Ottavio Vitolo Psychiatry Physician · Boston, MA NPI 1619198850 Anne Hseu Otolaryngology Physician · Boston, MA NPI 1477727683 Michelle Stein Psychologist · Boston, MA NPI 1346406378 Robert Salazar Student in an Organized Health Care Education/Training Program · Boston, MA NPI 1922482819
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-07-24.