npidata.org Sign in
Products
Provider RadarWatch an area and specialty — weekly alerts on new cliniciansPractice RadarWeekly alerts when new organisations register nearbySpecialtiesEvery NUCC taxonomy, with counts by state and cityStatesProvider counts and breakdowns for all 50 statesPhysician listsMDs and DOs with addresses and phone numbersNP listsNurse practitioners, the fastest-growing groupAPIJSON, delta feed, free tier
Use cases
Healthcare sales prospectingPhysician recruiting and locum staffingMedical device sales territory planningCredentialing and provider verificationHealthcare marketing lists and audience buildingPharmaceutical sales and prescriber targeting
Account
Start freeThree radars and an export a month Sign in Pricing
Explore
Data Labs API
About
About usTermsPrivacyContact us

Search › Massachusetts › 174400000X

Jonathan Held, M.D

NPI 1699767608 · on the registry since 2005

Practice

Address
190 Groton Rd
Suite 180
Ayer, MA 01432
Phone
(978) 772-7221
Fax
(978) 772-5849
Organisation at this address
Lotus Med Llc
Hilary A Curtis Llc
Apderm Nashoba, Pc.
Aurion Pharmacy Llc
Ayer Dermatology P.C.
Inferred from a shared address, not stated in the registry.
Clinicians at this address
16

Registry record

Primary taxonomy
174400000X
174400000X
Licence states on file
MA
From the registry's licence fields, which are often incomplete.
Sex
Male
Record last updated
2026-07-13

Source: CMS National Plan and Provider Enumeration System. Registration is not the same as practising, and the registry records no retirement — some people listed here no longer practise. More in Massachusetts