Dr. Matthew Nienaber, DO
1821 Wilshire Blvd Ste 100, Santa Monica, CA 90403 • +1-803-555-7213
Medical Education: Accredited U.S. Medical School (Class of 1997)
What This Doctor Actually Performs: CMS Medicare Utilization & Santa Monica Percentiles
NPI #1033535182 • CBSA Regional • Internal Medicine
Dr. Matthew Nienaber, DO (NPI #1033535182) practices Internal Medicine in Santa Monica, CA (90403) with sub-specialty concentration in 30 Active CMS HCPCS Codes, recording 653 annual CMS services across 116 distinct beneficiaries—placing this practice as a focused low-volume boutique caseload (1.33th Santa Monica percentile) (-0.11σ vs CA state mean, 2.49th statewide percentile).
Granular CPT/HCPCS billing distribution at 1821 Wilshire Blvd Ste 100 shows Dr. Matthew Nienaber's primary concentration in Moderate-to-High Complexity Internal Medicine Follow-Up (code 99214: 283x/yr, 12th local percentile) alongside Established Preventive & Chronic Care Visit (99213: 163x/yr, $119–$163).
For out-of-network patients contacting +1-803-555-7213, Dr. Nienaber's practice posts a $239.00 GPCI self-pay consult estimate ($239.00 patient-logged median, 4.71/5 composite reality score over 26 submissions).
Credentialed as an DO specialist with 29 years post-graduation experience since completing medical school at an LCME/COCA institution (1997), Dr. Nienaber coordinates 30 Active CMS HCPCS Codes workups from 1821 Wilshire Blvd Ste 100 (+1-803-555-7213).
Compared against Santa Monica, CA Internal Medicine peers
653 annual services across 116 beneficiaries
Standard deviations from CA Internal Medicine mean utilization
Top Billed HCPCS/CPT Procedures & GPCI Self-Pay Cash Benchmarks
| HCPCS | Clinical Procedure Description | Annual Volume | Local Pct | Est. Cash Range |
|---|---|---|---|---|
| 99214 | Moderate-to-High Complexity Internal Medicine Follow-Up | 283 | 12th | $155 – $213 |
| 99213 | Established Preventive & Chronic Care Visit | 163 | 12th | $119 – $163 |
| 93000 | In-Office 12-Lead Resting Electrocardiogram | 82 | 12th | $57 – $78 |
| G0439 | Annual Preventive Wellness & Cardiometabolic Risk Assessment | 63 | 12th | $182 – $250 |
| 99204 | Comprehensive New Patient Internal Medicine Diagnostic Visit | 38 | 12th | $216 – $296 |
| 96372 | Therapeutic Subcutaneous/Intramuscular Injection Administration (30 HCPCS billing breadth) | 25 | 1.33th | $140 – $203 |
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Dr. Matthew Nienaber, DO Fair Cash-Pay & Waiting-Room Scorecard
| Metric | Verified Benchmark | Source |
|---|---|---|
| Dr. Nienaber National Provider Identifier | NPI #1033535182 (DO) | CMS NPPES Registry (90403) |
| Dr. Nienaber Santa Monica CMS Volume Rank | 1.33th Pct (653 CMS svcs; Z -0.109σ) | CMS Medicare Part B (CA Internal Medicine) |
| Fair Cash-Pay New-Patient Benchmark | $239.00 (CPT 99204 GPCI Benchmark) | CMS Geographic Practice Cost Index (Santa Monica, CA) |
| Waiting-Room Wait Time & Cash Friendliness | $239.00 avg paid • 16 min lobby wait | 26 Anonymous Patient Reports |
| Listens Without Rushing & Modern Protocol Score | 4.69/5 Listening • 4.47/5 Modern Labs | CMS Provider Practice Cohort |
“Waiting Room” Patient Reality Scorecard
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