Marilyn Howarth, MD
NPI 1225064819 · Internal Medicine Physician · Philadelphia, PA
Marilyn Howarth, MD is a Internal Medicine Physician provider in Philadelphia, PA (NPI 1225064819).
Provider details
- NPI number
- 1225064819
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- MD043873E (PA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
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
Mailing address
Registry dates
- Enumerated
- 2006-06-24
- Last updated
- 2011-02-22
Frequently asked questions
- What is Marilyn Howarth's NPI number?
- Marilyn Howarth's National Provider Identifier (NPI) is 1225064819, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Marilyn Howarth's specialty?
- Marilyn Howarth is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is Marilyn Howarth located?
- Marilyn Howarth's practice location on file with NPPES is 3400 Spruce St, Philadelphia, PA 19104.
- What is Marilyn Howarth's phone number?
- The practice phone number listed in the NPPES registry for Marilyn Howarth is (215) 662-6963.
- Is Marilyn Howarth's NPI active?
- Yes — Marilyn Howarth's NPI (1225064819) is active in the NPPES registry as of the last update on 2011-02-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.