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John Shackelford, DO
NPI 1598724072 · Internal Medicine Physician · Harwich, MA
John Shackelford, DO is a Internal Medicine Physician provider in Harwich, MA (NPI 1598724072).
Provider details
- NPI number
- 1598724072
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- DO
- Sex
- Male
- Sole proprietor
- No
- License
- 220500 (MA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
Detailed profile(91/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
20 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
1421 Orleans Rd
Harwich, MA 02645-2148
Phone: (508) 778-4777
Fax: (508) 771-9555
Street-level locationGet directions
Mailing address
297 North St
Hyannis, MA 02601-5108
Registry dates
- Enumerated
- 2006-03-22
- Last updated
- 2019-06-17
Frequently asked questions
- What is John Shackelford's NPI number?
- John Shackelford's National Provider Identifier (NPI) is 1598724072, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Shackelford's specialty?
- John Shackelford is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Shackelford located?
- John Shackelford's practice location on file with NPPES is 1421 Orleans Rd, Harwich, MA 02645-2148.
- What is John Shackelford's phone number?
- The practice phone number listed in the NPPES registry for John Shackelford is (508) 778-4777.
- Is John Shackelford's NPI active?
- Yes — John Shackelford's NPI (1598724072) is active in the NPPES registry as of the last update on 2019-06-17.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.