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DANA M. WEISSHAAR MD
NPI 1952475550
Internal Medicine - Cardiovascular Disease in Los Gatos, CA

Active since November 17, 2006PECOS EnrolledAccepts Medicare Assignment
112 PEACH WILLOW CT, LOS GATOS, CA 95032(617) 286-6874(508) 206-8173 Get Directions Write a Review

NPPES record last updated: February 12, 2026. Verified against the NPPES registry weekly; last sync: October 18, 2026.

Record update history: Sep 10, 2025, Dec 6, 2021 (2 updates tracked since 2021).

About Dana M. Weisshaar Md NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DANA M. WEISSHAAR MD (NPI 1952475550) is an individual cardiovascular disease provider in Los Gatos, California, licensed in California (G075915) and active in the NPI registry since November 2006. She is enrolled in Medicare PECOS and is a graduate of Medical College Of Ohio (1989).

NPPES Registry Identity

NPI1952475550
Entity TypeIndividualFemale
Primary Taxonomy207RC0000X
Provider Legal NameDANA M. WEISSHAARCredential: MD
Location Address112 PEACH WILLOW CTLos Gatos, CA 95032-1362
Mailing Address160 Cambridgepark Dr Unit 112Cambridge, MA 02140-2452 · (617) 286-6874 · Fax (508) 206-8173
Phone(617) 286-6874
Fax(508) 206-8173
Sole ProprietorNo
Medical School CMSMedical College Of OhioGraduated 1989
Enumeration DateNovember 17, 2006
Last NPPES UpdateFebruary 12, 20262 updates tracked since enumeration
NPPES CertifiedFebruary 12, 2026
✔ NPI 1952475550 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses 2

★ Primary SpecialtyInternal Medicine · Cardiovascular DiseaseAllopathic & Osteopathic Physicians
Taxonomy Code207RC0000X
License✔ Licensed in CA · G075915
Definition
An internist who specializes in diseases of the heart and blood vessels and manages complex cardiac conditions such as heart attacks and life-threatening, abnormal heartbeat rhythms.
Also ListedInternal Medicine · Advanced Heart Failure and Transplant CardiologyTaxonomy 207RA0001X · License G75915 (CA)
112 PEACH WILLOW CT, Los Gatos, CA 95032
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Other Identifiers 1

Medicaid00G759150CA

Accepted Insurance

The full list of accepted plans is on the Insurance tab. Issuers include Blue Cross and Blue Shield of NC.Insurance ›

Medicare Participation & PECOS CMS

Medicare enrollment, assignment, billing reassignment, and ordering and referring status from CMS.

Medicare Enrollment Status

✔

Enrolled in Medicare and accepts Medicare assignment

Dana M. Weisshaar Md is registered in PECOS and agrees to accept the Medicare-approved amount as full payment. Medicare patients are not billed beyond the standard deductible and coinsurance.

PECOS PAC ID244429041
PECOS Enrollment IDI20110110000670
Eligible to Order & Refer✔ Part B Labs & Imaging✔ Durable Medical Equipment✔ Home Health Agency✔ Power Mobility DevicesPer the CMS Ordering and Referring file. Eligibility means Medicare pays claims that this provider orders or refers for these categories.

Medicare Billing Reassignments

4

Medicare enrollment records show Dana Weisshaar reassigns Medicare billing to 4 organizations. Each organization bills Medicare for the services this provider delivers there; the nearest is listed first.

Mohammed S. Qayyum M.D. Inc
1.5 mi
Specialist
2550 SAMARITAN DR, D
San Jose, CA 95124
  • Reassigned Medicare billing, California enrollment
  • Medicare enrollment name: Mohammed S Qayyum MD Inc
  • 4 clinicians in this Medicare group
NPI 1649647736 (408) 610-2001
Permanente Medical Group Inc
5.1 mi
Internal Medicine
710 LAWRENCE EXPRESSWAY
Santa Clara, CA 95051
  • Reassigned Medicare billing, California enrollment
  • 20,078 clinicians in this Medicare group
NPI 1073606299 (408) 851-1000
Empallo Medical Group Of New Jersey, PC
2,552 mi
Cardiovascular Disease
418 BROADWAY STE N
Albany, NY 12207
  • Reassigned Medicare billing, California enrollment
NPI 1346196854 (617) 286-6874
Empallo Medical Group, P.A.
2,686 mi
Cardiovascular Disease
160 CAMBRIDGEPARK DR UNIT 112
Cambridge, MA 02140
  • Reassigned Medicare billing, California enrollment
  • 3 clinicians in this Medicare group
NPI 1578396230 (617) 286-6874

Source: CMS Revalidation Reassignment List, October 2026 release. Reassignment records can lag staffing changes; confirm a current affiliation with the organization.

Areas of Expertise CMS Part B claims 4

Services this provider delivered to Medicare fee-for-service patients, from the CMS Medicare utilization data. Higher counts generally reflect more experience with a service; care delivered outside Medicare is not included.

Routine electrocardiogram (ecg) using at least 12 leads with interpretation and report 93000
An electrocardiogram (ECG) is a non-invasive test that records your heart's electrical activity. Using 12 leads attached to your body, it captures data to help identify heart conditions. A doctor interprets the results and provides a report.
21 services21 patients
Established patient office or other outpatient visit with moderate level of decision making, if using time, 30 minutes or more 99214
This is a routine check-up for patients who have previously visited our clinic. It involves a comprehensive review of your health and any ongoing treatments. The consultation lasts between 30-39 minutes, allowing enough time to discuss any concerns.
20 services14 patients
New patient office or other outpatient visit with a high level of medical decision making, if using time, 60 minutes or more 99205
This is a first-time patient visit where a healthcare professional spends 60-74 minutes with you. It involves a comprehensive evaluation, including your medical history and current health condition. They'll also advise on preventive health measures and formulate a treatment plan if needed.
18 services18 patients
Established patient office or other outpatient visit with high level of medical decision making, if using time, 40 minutes or more 99215
This service involves a follow-up appointment for existing patients, lasting between 40 to 54 minutes. During this time, your healthcare provider will assess your current health status, discuss any changes or concerns, review your treatment plan, and answer any questions you may have.
17 services14 patients

Physician Visit Costs CMS claims · ZIP area

Typical Medicare office-visit costs in the 95032 ZIP code area, from fee-for-service claims. These are area statistics, not this provider’s prices; actual charges vary by service and coverage.

New Patient
$156.67 typical visit price
range $70.37 – $206.04
Typical copayment $39.16 (range $17.59 – $51.51)
Most-billed visit code 99204
Established Patient
$86.56 typical visit price
range $23.96 – $169.60
Typical copayment $21.64 (range $5.99 – $42.40)
Most-billed visit code 99213
Amounts reflect what Medicare beneficiaries in this ZIP area are typically charged for office visits. Patients with other coverage should check their individual plans.

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Dana Weisshaar's NPI number?

The NPI number for Dana Weisshaar is 1952475550. It was assigned to this individual provider in the NPPES registry on November 17, 2006.

Where is Dana Weisshaar located?

Dana Weisshaar practices at 112 Peach Willow Ct, Los Gatos, CA 95032. The listed phone number is (617) 286-6874.

What is Dana Weisshaar's specialty?

The primary specialty registered for this NPI is Internal Medicine, specializing in Cardiovascular Disease, with taxonomy code 207RC0000X.

Is Dana Weisshaar enrolled in Medicare?

Yes. Dana Weisshaar is registered in the Medicare PECOS system and accepts Medicare assignment, which means accepting the Medicare-approved amount as payment in full for covered services.

Which organizations bill Medicare for Dana Weisshaar's services?

According to the CMS Revalidation Reassignment List (October 2026 release), Dana Weisshaar reassigns Medicare benefits to 4 organizations: Mohammed S. Qayyum M.D. Inc (San Jose, CA), Permanente Medical Group Inc (Santa Clara, CA), Empallo Medical Group Of New Jersey, PC (Albany, NY) and Empallo Medical Group, P.A. (Cambridge, MA). Each reassignment is filed with Medicare on form CMS-855R, signed by both the clinician and the organization, and lets the organization bill Medicare and receive payment for Dana Weisshaar's services. Reassignment records can lag staffing changes; confirm current arrangements with the organization.

What insurance does Dana Weisshaar accept?

Health plans from Blue Cross and Blue Shield of NC list Dana Weisshaar as in-network in at least one marketplace plan. Coverage varies by plan and year; verify with the insurer or the provider before a visit.

When was this NPI record last updated?

The NPPES record for Dana Weisshaar was last updated on February 12, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 8 months ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.