What is Nestor Unger's NPI number?

Nestor Unger's National Provider Identifier (NPI) is 1003810516, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Nestor Unger's specialty?

Nestor Unger is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).

Where is Nestor Unger located?

Nestor Unger's practice location on file with NPPES is 58 Calle Ramon Flores, Aibonito, PR 00705-1705.

What is Nestor Unger's phone number?

The practice phone number listed in the NPPES registry for Nestor Unger is (787) 649-2020.

Does Nestor Unger accept Medicare?

Nestor Unger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.

Is Nestor Unger's NPI active?

Yes — Nestor Unger's NPI (1003810516) is active in the NPPES registry as of the last update on 2013-12-03.

IndividualActiveAccepts Medicare

Nestor Unger, M.D.

NPI 1003810516 · Nephrology Physician · Aibonito, PR

Nestor Unger, M.D. is a Nephrology Physician provider in Aibonito, PR (NPI 1003810516).

Provider details

NPI number: 1003810516
Entity type: Individual
Primary specialty: Nephrology PhysicianAllopathic & Osteopathic Physicians
Credential: M.D.
Sex: Male
Sole proprietor: Yes
License: 14653 (PR)

Practice location

58 Calle Ramon Flores

Aibonito, PR 00705-1705

Phone: (787) 649-2020

Fax: (787) 954-0607

Street-level locationGet directions

More PR providers

Mailing address

Po Box 1705

Aibonito, PR 00705-1705

Specialties & taxonomies

Nephrology PhysicianPrimary207RN0300XLicense 14653 (PR)
Allopathic & Osteopathic Physicians
Internal Medicine Physician207R00000XLicense 14653 (PR)
Allopathic & Osteopathic Physicians
Internal Medicine Physician207R00000XLicense ME 86319 (FL)
Allopathic & Osteopathic Physicians
Nephrology Physician207RN0300XLicense ME 86319 (FL)
Allopathic & Osteopathic Physicians

Enrolled with Medicare as Practitioner - Internal Medicine · source: CMS PECOS Public Provider Enrollment (2026.04.01)

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
21 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 · 72 distinct drugs on file.

Drug	Part D claims (2024)	Beneficiaries
Levothyroxine Sodiumbrand: Synthroid	304	57
Atorvastatin Calcium	231	71
Famotidine	181	54
Dapagliflozin Propanediolbrand: Farxiga	158	49
Metoprolol Succinate	147	41
Omeprazole	146	38
Doxazosin Mesylate	145	50
Duloxetine Hcl	139	36
Candesartan Cilexetil

Medicare Part D only. These counts cover prescriptions paid through Medicare Part D in 2024 — they do not include cash-pay, commercial-insurance, Medicaid, or Part B–administered drugs, and badly undercount high cash-pay categories (e.g. GLP-1 weight-loss, testosterone, and ED medications). Any drug with 10 or fewer claims is omitted by CMS, and beneficiary counts under 11 are suppressed — so a missing drug means no Part D record, never zero. This is a factual claims summary, not an endorsement, not medical advice, and not a consumer report. Source: CMS Medicare Part D Prescribers — by Provider and Drug.

Enumerated: 2005-06-13
Last updated: 2013-12-03

Frequently asked questions

What is Nestor Unger's NPI number?: Nestor Unger's National Provider Identifier (NPI) is 1003810516, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
What is Nestor Unger's specialty?: Nestor Unger is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
Where is Nestor Unger located?: Nestor Unger's practice location on file with NPPES is 58 Calle Ramon Flores, Aibonito, PR 00705-1705.
What is Nestor Unger's phone number?: The practice phone number listed in the NPPES registry for Nestor Unger is (787) 649-2020.
Does Nestor Unger accept Medicare?: Nestor Unger is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
Is Nestor Unger's NPI active?: Yes — Nestor Unger's NPI (1003810516) is active in the NPPES registry as of the last update on 2013-12-03.

Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.

Provider details

Practice location

Mailing address

Specialties & taxonomies

Profile Score

What this provider prescribes (Medicare Part D)

Registry dates

Frequently asked questions

Specialties & taxonomies

Frequently asked questions

Profile Score

What this provider prescribes (Medicare Part D)