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NEFF, JAMESM.D. NPI 1013992015 Clinician

Internal Medicine · CORPUS CHRISTI, TX

Specialty Internal Medicine — from billed Medicare claims
Trained UNIVERSITY OF TEXAS SOUTHWESTERN MEDICAL SCHOOL AT DALLAS — medical school, self-reported to CMS
In practice about 47 years since medical school (class of 1979, self-reported to CMS)
Location CORPUS CHRISTI, TX · NPPES registered location
Active in data Billed Medicare 2020–2024 (5 consecutive years)
Scale 42 codes billed · 7,992 disclosed services (CY2024 — most recent year in data)
Current groups
member of 3 groups; the volumes below are this clinician's personal volume and are not attributed to any single group

Group affiliation since 2019

20192026
SHEA PHYSICAL THERAPY SPECIALISTS LLC
2025–2026
SOUTH TEXAS SPORTS MEDICINE INC
2025–2026
CHRISTUS TRINITY CLINIC
2021–2026
THOMAS-SPANN CLINIC, P.A.
2019–2021

The roster archive begins in 2019, so a span starting at 2019 may reach back further. Membership spans only — no volume is attributed to any group here.

NPPES registry · CMS Doctors & Clinicians registry · Medicare Part B physician/supplier claims · NPPES record last updated 2007-07

Year: 2024 · 2023 · 2022  · 2021  · 2020 

Provider overview · all codes · CY2024

The full analytics for this provider

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The billed-volume positioning, practice focus, and economics behind this provider — computed on the same disclosed Medicare Part B data.

This provider's disclosed Medicare payments across all codes were in CY2024. Unlock to see the figure.

  • Payment, service & beneficiary totals — the disclosed scale, all codes
  • Practice profile — focus & reach — top codes by share of services
  • Office vs. facility setting mix — place-of-service code split
  • Volume over five years — discrete yearly counts, no rate
  • Peer positioning — service volume — percentile among specialty peers, cohort & year disclosed
  • Peer positioning — code breadth — how many codes billed, vs peers

Peer positioning shows billed-volume and code-breadth positions among specialty peers, not measures of care (a provider's true volume position can only be higher, never lower). All figures disclosed Medicare Part B fee-for-service; volumes are personal to this NPI, not attributed to any group.

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Procedures billed to Medicare Part B (2024)

Medicare Part B FFS · CY2024 · as published by CMS
CodeDescription Services Beneficiary-episodes Avg charge Avg Medicare payment
J1010 Injection, methylprednisolone acetate, 1 mg
Q9967 Low osmolar contrast material, 300-399 mg/ml iodine concentration, per ml
99214 Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more
36415 Insertion of needle into vein for collection of blood sample
85025 Complete blood cell count (red cells, white blood cell, platelets), automated test and automated differential white blood cell count
80053 Blood test, comprehensive group of blood chemicals
80061 Blood test, lipids (cholesterol and triglycerides)
81001 Manual urinalysis test with examination using microscope, automated
84443 Blood test, thyroid stimulating hormone (tsh)
J3301 Injection, triamcinolone acetonide, not otherwise specified, 10 mg
93000 Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report
83036 Hemoglobin a1c level
99215 Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more
71046 X-ray of chest, 2 views
87086 Bacterial colony count, urine
99213 Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more
85652 Red blood cell sedimentation rate, to detect inflammation, automated
84153 Psa (prostate specific antigen) measurement, total
96372 Injection of drug or substance under skin or into muscle
G0103 Prostate cancer screening; prostate specific antigen test (psa)
83880 Natriuretic peptide (heart and blood vessel protein) level
G0439 Annual wellness visit, includes a personalized prevention plan of service (pps), subsequent visit
84481 Thyroid hormone, t3 measurement, free
87077 Bacterial culture for aerobic isolates
87186 Evaluation of antimicrobial drug (antibiotic, antifungal, antiviral), microdilution or agar dilution
84439 Thyroxine (thyroid chemical), free
93015 Exercise or drug-induced heart stress test with electrocardiogram (ecg) with supervision and review by physician
77080 Dxa bone density measurement of hip, pelvis, spine
20610 Aspiration and/or injection of fluid from large joint
93306 Ultrasound of heart with color-depicted blood flow, rate, direction and valve function
82306 Vitamin d-3 level
83615 Lactate dehydrogenase (enzyme) level
G0179 Physician or allowed practitioner re-certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians a
82607 Cyanocobalamin (vitamin b-12) level
93880 Ultrasound of both sides of head and neck blood flow
83540 Iron level
83550 Iron binding capacity
82728 Ferritin (blood protein) level
80048 Blood test, basic group of blood chemicals (calcium, total)
82270 Stool analysis for blood to screen for colon tumors
99495 Transitional care management services for problem of at least moderate complexity
G0180 Physician or allowed practitioner certification for medicare-covered home health services under a home health plan of care (patient not present), including contacts with home health agency and review of reports of patient status required by physicians and

These are this provider's own Medicare Part B fee-for-service volumes (CMS public data). CMS suppresses rows with fewer than 11 beneficiaries, so low-volume codes may be missing entirely — absence is not zero. Beneficiary-episodes count CMS's per-setting beneficiary figures, not unique patients. Average charge and average Medicare payment are weighted by service volume across office and facility settings. Volumes on this page are personal to the NPI and are not attributed to any physician group. See Methods & Sources.