John Patrick Sia, MD
NPI 1255597464 · Nephrology Physician · Manchester, NH
Enrolled with Medicare as Practitioner - Nephrology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Patrick Sia, MD is a Nephrology Physician provider in Manchester, NH (NPI 1255597464).
Provider details
- NPI number
- 1255597464
- Entity type
- Individual
- Primary specialty
- Nephrology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- 17413 (NH)
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
17 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
2,130 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) |
|---|---|---|
| Dialysis Services, Per Day, Less Than Full Month Service (20 Years Or Older)90970 | 675 | $9 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 357 | $127 |
| Dialysis Services, 4 Or More Physician Visits Per Month (20 Years Or Older)90960 | 351 | $361 |
| Home Dialysis Services Per Month (20 Years Or Older)90966 | 186 | $295 |
| Hemodialysis Procedure With Physician Evaluation90935 | 155 | $69 |
| Dialysis Services, 2-3 Physician Visits Per Month (20 Years Or Older)90961 | 102 | $300 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 29 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Sevelamer Carbonate | 130 | 43 |
| Furosemide | 79 | 35 |
| Amlodipine Besylate | 74 | 31 |
| Dapagliflozin Propanediolbrand: Farxiga | 73 | 16 |
| Lisinopril | 72 | 27 |
| Losartan Potassium | 65 | 23 |
| Calcitriol | 43 | 15 |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$7,642 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
- 2008-08-06
- Last updated
- 2016-04-28
Frequently asked questions
- What is John Patrick Sia's NPI number?
- John Patrick Sia's National Provider Identifier (NPI) is 1255597464, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Patrick Sia's specialty?
- John Patrick Sia is listed in the NPPES registry with a primary specialty of Nephrology Physician (Allopathic & Osteopathic Physicians).
- Where is John Patrick Sia located?
- John Patrick Sia's practice location on file with NPPES is 1750 Elm Street, Manchester, NH 03104-2903.
- What is John Patrick Sia's phone number?
- The practice phone number listed in the NPPES registry for John Patrick Sia is (603) 621-2948.
- Does John Patrick Sia accept Medicare?
- John Patrick Sia is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Patrick Sia's NPI active?
- Yes — John Patrick Sia's NPI (1255597464) is active in the NPPES registry as of the last update on 2016-04-28.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.