Quick answers
- Does John C. Sparks Jr. accept Medicare assignment?
- Yes. Medicare's clinician data says John C. Sparks Jr. accepts Medicare assignment (the Medicare-approved amount as full payment for covered services), as of October 2, 2026. Ask the office to confirm before your visit.
- How many Medicare patients does John C. Sparks Jr. see?
- In 2024, CMS data shows 400 Original Medicare patients and 4,936 services for John C. Sparks Jr.. This counts Original Medicare only and measures volume, not quality.
- What is John C. Sparks Jr.'s NPI number?
- 1558353177. The NPI (National Provider Identifier) is the clinician's permanent federal ID; you can look it up in the official NPI Registry.
Medicare activity in 2024
Official CMS public-use data for John C. Sparks Jr., data year 2024 (released May 21, 2026). It covers Original Medicare (fee-for-service) patients only, not Medicare Advantage or other insurance. It shows volume, not quality or outcomes. CMS hides any count of 10 or fewer patients.
| Original Medicare patients | 400 |
|---|---|
| Services billed to Medicare | 4,936 |
| Different services or procedures | 64 |
| Participating Medicare provider | Yes |
| Average age of these patients | 75 |
Most frequent services
- Injection, triamcinolone acetonide, not otherwise specified, 10 mg (J3301)2,179 services
- Aspiration and/or injection of fluid from large joint (20610)493 services
- Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more (99213)360 services
- Hyaluronan or derivative, hyalgan, supartz or visco-3, for intra-articular injection, per dose (J7321)355 services
- Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more (99214)329 services
Chronic conditions among these patients
Share of this clinician’s Original Medicare patients with each condition, as published by CMS (it describes the patients, not the care given).
- High blood pressure75%
- High cholesterol75%
- Arthritis75%
- Ischemic heart disease25%
- Diabetes23%
- Anxiety22%
Hospitals where John C. Sparks Jr. works
Medicare's Facility Affiliation Data lists John C. Sparks Jr. at these hospitals (updated October 2, 2026). Each hospital page shows its address, phone, emergency services, Medicare rating and all its clinicians. Star rating and emergency services: Hospital General Information (CMS), data updated October 26, 2026.
- Aspire HospitalConroe, TX · Psychiatric Hospital · CCN 670093
- CHI St. Luke's Lakeside HospitalThe Woodlands, TX · Acute Care Hospital · CCN 670059
- Houston Methodist The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · Medicare rating: 5 of 5 stars · CCN 670122
- Memorial Hermann Northeast HospitalHumble, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450684
- St. Luke's The Woodlands HospitalThe Woodlands, TX · Acute Care Hospital · Medicare rating: 3 of 5 stars · CCN 450862
Practice locations
Addresses where John C. Sparks Jr. is enrolled with Medicare (CMS data updated October 2, 2026).
- 1020 Riverwood Ct, Suite 340Conroe, TX 77304 (936) 539‑2663
- 500 N Kobayashi, Suite CWebster, TX 77598 (281) 946‑6244
Group practices
Medicare enrollment lists John C. Sparks Jr. as a member of this group (CMS data updated October 2, 2026).
- CLS Health PLLC180 clinicians in the group
Specialties
- Orthopedic Surgeryprimary
Other orthopedic surgeons in Texas
Clinicians with the same Medicare primary specialty in Texas — not a recommendation.
Other clinicians in CLS Health PLLC
Medicare enrollment lists these clinicians in the same group practice — not a recommendation.
Clinician information
| Credential | MD |
|---|---|
| Medical school | University Of Texas Medical School At San Antonio |
| Graduation year | 1986 (40 years since medical school) |
| Gender (as listed) | Male |
| Medicare assignment | Accepts (Medicare-approved amount as full payment) |
| NPI (National Provider Identifier) | 1558353177 |
| Corrections | Report an error or suggest an update → |
Most corrections must be made at the source: clinicians update their NPI Registry record (NPPES) and their Medicare enrollment (PECOS); this page follows the next data release.
Sources
- Facility Affiliation Data — Centers for Medicare & Medicaid Services (CMS), data updated October 2, 2026, retrieved October 29, 2026
- Hospital General Information — CMS, data updated October 26, 2026, retrieved November 13, 2026
- National Downloadable File (Doctors and Clinicians) — CMS, data updated October 2, 2026, retrieved October 29, 2026
- Medicare Physician & Other Practitioners - by Provider — CMS, data year 2024, released May 21, 2026; Medicare Physician & Other Practitioners - by Provider and Service
- NPI Registry — U.S. Department of Health and Human Services (NPPES), the clinician’s official record
- Medicare Care Compare — official Medicare tool to look up clinicians