John Shackelford, DO
Internal Medicine Physician · Harwich, MA
John Shackelford, DO is an internal medicine physician with a practice address in Harwich, Massachusetts, and NPI 1598724072, issued on Mar 22, 2006. Check the license (Massachusetts 220500, as entered in NPPES) on the Massachusetts Board of Registration in Medicine; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- John Shackelford
- Credential
- DO
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 220500 MA
Self-reported in NPPES; status is on the state search - Practice location
- 1421 Orleans RD, Harwich, MA 02645
- Phone
- (508) 778-4777
- Enumerated
- Mar 22, 2006
- Entity
- Type 1 · individual
Also registered at 1421 Orleans RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Mohammad Arshad, D.OAdult Medicine Physician1386730158
- Gaurav Dang, M.D.Family Medicine Physician1386896256
- Marie Hartley, PA-CMedical Physician Assistant1386731115
Verify John Shackelford in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersMassachusetts Board of Registration in Medicine
Search for license 220500Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS, AOA, NCCPA, AANPNot checked
7 internal medicine physician records list a Harwich practice address
They are 7 of the 125 NPPES records with a Harwich practice address, and 6,825 internal medicine physician records in Massachusetts. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 7 in Harwich → All 6,825 in Massachusetts → Every provider in Harwich →
Other internal medicine physician records in Massachusetts
- Nawal Aamir, MDWorcester, MA1588248926
- Nathan Abare, MDSpringfield, MA1386852747
- Nooshin Abbasi, MD MPHNewton, MA1831888353
- Taimur AbbasiBoston, MA1841673522
- Lauren Abbate, MDBoston, MA1922099621
- Bassima Abdallah, MDBoston, MA1912327305
- Maya Abdallah, MDBoston, MA1861854937
- Samah Abdallah, MDBrighton, MA1730814971
- Omar Abdel-Wahab, M.D.Boston, MA1023042777
- Mohab AbdelhalimBoston, MA1871388496
Common questions
What is John Shackelford, DO's NPI number?
John Shackelford, DO's National Provider Identifier (NPI) is 1598724072, issued on Mar 22, 2006. An NPI identifies a provider in billing; it is not a license.
Where is John Shackelford, DO located?
The NPPES record lists a practice address at 1421 Orleans RD, Harwich, MA, 02645. Phone: (508) 778-4777. Providers update this record themselves, so call before visiting.
How can I verify John Shackelford, DO's license?
NPPES lists Massachusetts license number 220500, 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.
Source: CMS National Plan and Provider Enumeration System (NPPES), loaded Aug 27, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. 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) 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 27, 2026.