Guy H Grayson MD PA
NPI 1891991410 · Pediatric Hematology & Oncology Physician · Harlingen, TX
Guy H Grayson MD PA is a Pediatric Hematology & Oncology Physician organization in Harlingen, TX (NPI 1891991410).
Provider details
- NPI number
- 1891991410
- Entity type
- Organization
- Primary specialty
- Pediatric Hematology & Oncology PhysicianAllopathic & Osteopathic Physicians
- Organization subpart
- No
- Authorized official
- Guy Grayson, President(956) 365-4419
- License
- J0507 (TX)
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
19 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
Other names (DBA / former)
- Doing business as
- Valley Childrens Cancer and Blood Disease Center
Registry dates
- Enumerated
- 2007-06-21
- Last updated
- 2008-07-28
Frequently asked questions
- What is Guy H Grayson MD PA's NPI number?
- Guy H Grayson MD PA's National Provider Identifier (NPI) is 1891991410, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What type of organization is Guy H Grayson MD PA?
- Guy H Grayson MD PA is classified in the NPPES registry as Pediatric Hematology & Oncology Physician (Allopathic & Osteopathic Physicians).
- Where is Guy H Grayson MD PA located?
- Guy H Grayson MD PA's practice location on file with NPPES is 1911 Lubbock St, Harlingen, TX 78550-8233.
- What is Guy H Grayson MD PA's phone number?
- The practice phone number listed in the NPPES registry for Guy H Grayson MD PA is (866) 242-0010.
- Who is the authorized official for Guy H Grayson MD PA?
- The authorized official listed on Guy H Grayson MD PA's NPPES record is Guy Grayson, President. The authorized official registers and maintains the organization's NPI and is not necessarily its owner.
- Is Guy H Grayson MD PA's NPI active?
- Yes — Guy H Grayson MD PA's NPI (1891991410) is active in the NPPES registry as of the last update on 2008-07-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.