John Manllo Dieck, M.D.
NPI 1578855680 · Internal Medicine Physician · Mcallen, TX
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Manllo Dieck, M.D. is a Internal Medicine Physician provider in Mcallen, TX (NPI 1578855680).
Provider details
- NPI number
- 1578855680
- Entity type
- Individual
- Primary specialty
- Internal Medicine PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D.
- Sex
- Male
- Sole proprietor
- No
- License
- 4301 098 223 (MI)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
15 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
926 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. 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 .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 35 Minutes99232 | 312 | $79 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 180 | $350 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 154 | $126 |
| Subsequent Hospital Care With Moderate Levelof Medical Decision Making, If Using Time, at Least 50 Minutes99233 | 115 | $118 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 78 | $290 |
| Initial Hospital Care With Moderate Level of Medical Decision Making, If Using Time, at Least 75 Minutes99223 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 26 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sevelamer Carbonate | 143 | 48 |
| Patiromer Calcium Sorbitexbrand: Veltassa | 102 | 28 |
| Sucroferric Oxyhydroxidebrand: Velphoro | 79 | 15 |
| Furosemide | 68 | 26 |
| Losartan Potassium | 53 | 25 |
| Prednisone | 49 | 14 |
| Amlodipine Besylate | 38 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$2,920 across 45 records (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2011-05-07
- Last updated
- 2022-07-21
Frequently asked questions
- What is John Manllo Dieck's NPI number?
- John Manllo Dieck's National Provider Identifier (NPI) is 1578855680, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Manllo Dieck's specialty?
- John Manllo Dieck is listed in the NPPES registry with a primary specialty of Internal Medicine Physician (Allopathic & Osteopathic Physicians).
- Where is John Manllo Dieck located?
- John Manllo Dieck's practice location on file with NPPES is 1901 S 1st St Ste 600, Mcallen, TX 78503-1228.
- What is John Manllo Dieck's phone number?
- The practice phone number listed in the NPPES registry for John Manllo Dieck is (956) 631-6136.
- Does John Manllo Dieck accept Medicare?
- John Manllo Dieck is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Manllo Dieck's NPI active?
- Yes — John Manllo Dieck's NPI (1578855680) is active in the NPPES registry as of the last update on 2022-07-21.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.