Tonya Kaltenbach, MD
NPI 1578618419 · Specialist · Palo Alto, CA
Enrolled with Medicare as Practitioner - Gastroenterology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tonya Kaltenbach, MD is a Specialist provider in Palo Alto, CA (NPI 1578618419).
Provider details
- NPI number
- 1578618419
- Entity type
- Individual
- Primary specialty
- SpecialistOther Service Providers
- Credential
- MD
- Sex
- Female
- Sole proprietor
- No
- License
- A81539 (CA)
Specialties & taxonomies
Other Service Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
19 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
68 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) |
|---|---|---|
| Removal of Polyps Or Growths of Large Bowel Using an Endoscope With Mechanical Snare45385 | 29 | $245 |
| Biopsy of Large Bowel Using a Flexible Endoscope45380 | 20 | $90 |
| Removal of Large Bowel Tissue Using a Flexible Endoscope45390 | 19 | $366 |
Typical Medicare-allowed amounts for these services range $90–$366 (2024). The Medicare-allowed amount is what Medicare recognizes for a service under fee-for-service — a reference figure for 2024, not a price quote and not what you would be billed. Medicare Part B covers roughly an eighth of all NPIs (65+ skew); services with fewer than 11 beneficiaries are suppressed by CMS. Source: CMS Medicare Physician & Other Practitioners, by Provider & Service.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$73,188 across 59 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
- 2007-01-23
- Last updated
- 2015-12-31
Frequently asked questions
- What is Tonya Kaltenbach's NPI number?
- Tonya Kaltenbach's National Provider Identifier (NPI) is 1578618419, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tonya Kaltenbach's specialty?
- Tonya Kaltenbach is listed in the NPPES registry with a primary specialty of Specialist (Other Service Providers).
- Where is Tonya Kaltenbach located?
- Tonya Kaltenbach's practice location on file with NPPES is 3801 Miranda Ave, Palo Alto, CA 94304-1207.
- What is Tonya Kaltenbach's phone number?
- The practice phone number listed in the NPPES registry for Tonya Kaltenbach is (650) 493-5000.
- Does Tonya Kaltenbach accept Medicare?
- Tonya Kaltenbach is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tonya Kaltenbach's NPI active?
- Yes — Tonya Kaltenbach's NPI (1578618419) is active in the NPPES registry as of the last update on 2015-12-31.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.