Manuel Diaz, M.D.
NPI 1851420004 · Addiction Medicine (Psychiatry & Neurology) Physician · Guaynabo, PR
Enrolled with Medicare as Practitioner - Psychiatry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Manuel Diaz, M.D. is a Addiction Medicine (Psychiatry & Neurology) Physician provider in Guaynabo, PR (NPI 1851420004).
Provider details
- NPI number
- 1851420004
- Entity type
- Individual
- Primary specialty
- Addiction Medicine (Psychiatry & Neurology) PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 8649 (PR)
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.
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 37 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Clonazepam | 1,148 | 132 |
| Trazodone Hcl | 787 | 79 |
| Temazepam | 761 | 98 |
| Sertraline Hcl | 631 | 69 |
| Fluoxetine Hcl | 482 | 52 |
| Risperidone | 344 | 37 |
| Lorazepam | 311 | 43 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2007-03-05
- Last updated
- 2007-07-08
Frequently asked questions
- What is Manuel Diaz's NPI number?
- Manuel Diaz's National Provider Identifier (NPI) is 1851420004, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Manuel Diaz's specialty?
- Manuel Diaz is listed in the NPPES registry with a primary specialty of Addiction Medicine (Psychiatry & Neurology) Physician (Allopathic & Osteopathic Physicians).
- Where is Manuel Diaz located?
- Manuel Diaz's practice location on file with NPPES is Edif Caparra Gallery, Guaynabo, PR 00966-2515.
- What is Manuel Diaz's phone number?
- The practice phone number listed in the NPPES registry for Manuel Diaz is (787) 531-6840.
- Does Manuel Diaz accept Medicare?
- Manuel Diaz is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Manuel Diaz's NPI active?
- Yes — Manuel Diaz's NPI (1851420004) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.