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DR. DAVID WATERHOUSE GRAY M.D.
NPI 1821383134
Internal Medicine in Clearwater, FL

Active since June 15, 2011PECOS Enrolled
612 DRUID RD E, CLEARWATER, FL 33756(727) 443-6400(727) 443-5590 Get Directions Write a Review

NPPES record last updated: March 1, 2018. Verified against the NPPES registry weekly; last sync: November 01, 2026.

About Dr. David Waterhouse Gray M.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. DAVID WATERHOUSE GRAY M.D. (NPI 1821383134) is an individual internal medicine provider in Clearwater, Florida, licensed in Massachusetts (248869) and active in the NPI registry since June 2011. He is enrolled in Medicare PECOS.

NPPES Registry Identity

NPI1821383134
Entity TypeIndividualMale
Primary Taxonomy207R00000X
Provider Legal NameDR. DAVID WATERHOUSE GRAYCredential: M.D.
Location Address612 DRUID RD EClearwater, FL 33756-3912
Mailing Address612 Druid Rd EClearwater, FL 33756-3912 · (727) 443-6400 · Fax (727) 443-5590
Phone(727) 443-6400
Fax(727) 443-5590
Sole ProprietorNo
Enumeration DateJune 15, 2011
Last NPPES UpdateMarch 1, 2018
✔ NPI 1821383134 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal MedicineAllopathic & Osteopathic Physicians
Taxonomy Code207R00000X
License✔ Licensed in MA · 248869
Definition
A physician who provides long-term, comprehensive care in the office and the hospital, managing both common and complex illness of adolescents, adults and the elderly. Internists are trained in the diagnosis and treatment of cancer, infections and diseases affecting the heart, blood, kidneys, joints and digestive, respiratory and vascular systems. They are also trained in the essentials of primary care internal medicine, which incorporates an understanding of disease prevention, wellness, substance abuse, mental health and effective treatment of common problems of the eyes, ears, skin, nervous system and reproductive organs.
Also ListedInternal Medicine · RheumatologyTaxonomy 207RR0500X · License 133561 (FL)
612 DRUID RD E, Clearwater, FL 33756
Open in Google Maps ↗

Other Identifiers 1

OtherME133561FL · Florida Board Of Medicine

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare (PECOS)

Dr. David Waterhouse Gray M.d. is registered in the CMS Provider Enrollment, Chain and Ownership System (PECOS).

Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignment

Medicare enrollment records show David Gray reassigns Medicare billing to 1 organization. The organization bills Medicare for the services this provider delivers there.

Arthritis & Rheumatism Associates Pl
Same address
Rheumatology
612 DRUID RD E
Clearwater, FL 33756
  • Reassigned Medicare billing, Florida enrollment
  • 8 clinicians in this Medicare group
NPI 1942284849 (727) 443-6400

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 33756 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$130.04 typical visit price
range $56.00 – $171.84
Typical copayment $32.51 (range $14.00 – $42.96)
Most-billed visit code 99204
Established Patient
$99.16 typical visit price
range $17.57 – $139.16
Typical copayment $24.79 (range $4.39 – $34.79)
Most-billed visit code 99214
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Other Providers at the Same Location NPPES 8

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

OPTIMAL PERFORMANCE AND PHYSICAL THERAPIES-CLEARWATER, LLC
Physical Therapist
612 DRUID RD E, SUITE D
CLEARWATER, FL 33756
Pinellas County (727) 475-5543
ADAM MICHAEL ROSEN MD
Internal Medicine (Rheumatology)
612 DRUID RD E
CLEARWATER, FL 33756
Pinellas County (727) 443-6400
RADIOLOGY ASSOCIATES OF CLEARWATER
Radiology (Diagnostic Radiology)
612 DRUID RD E
CLEARWATER, FL 33756
Pinellas County (727) 443-6400
ARTHRITIS & RHEUMATISM ASSOCIATES PL
Non-Pharmacy Dispensing Site
612 DRUID RD E, SUITE C
CLEARWATER, FL 33756
Pinellas County (727) 443-6400
EUGENIA R RULLAN BIDOT MD
Internal Medicine (Rheumatology)
612 DRUID RD E
CLEARWATER, FL 33756
Pinellas County (727) 443-6400
MARY FOX PT, DPT, OCS
Physical Therapist
612 DRUID RD E, STE D
CLEARWATER, FL 33756
Pinellas County (727) 475-5543
MARINA VALDES ARNP
Nurse Practitioner (Adult Health)
612 DRUID RD E
CLEARWATER, FL 33756
Pinellas County (727) 443-6400
ARTHRITIS & RHEUMATISM ASSOCIATES PL
Internal Medicine (Rheumatology)
612 DRUID RD E
CLEARWATER, FL 33756
Pinellas County (727) 443-6400

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is David Gray's NPI number?

The NPI number for David Gray is 1821383134. It was assigned to this individual provider in the NPPES registry on June 15, 2011.

Where is David Gray located?

David Gray practices at 612 Druid Rd E, Clearwater, FL 33756. The listed phone number is (727) 443-6400.

What is David Gray's specialty?

The primary specialty registered for this NPI is Internal Medicine with taxonomy code 207R00000X.

Is David Gray enrolled in Medicare?

Yes. David Gray is registered in the Medicare PECOS enrollment system.

Which organization bills Medicare for David Gray's services?

According to the CMS Revalidation Reassignment List (October 2026 release), David Gray reassigns Medicare benefits to Arthritis & Rheumatism Associates Pl (Clearwater, FL). The reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for David Gray's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

When was this NPI record last updated?

The NPPES record for David Gray was last updated on March 1, 2018. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.