Medicare Enrolled
Dr. Manjari Nathan, M.D.
Sleep Medicine (Internal Medicine) Physician · Walnut Creek, CA
Practice pattern: Clinical Cardiology
— Primarily office-based clinical cardiology
Low-engagement
Very High
DATA COVERAGE
Data in 4 of 4 federal sources
Measures public federal data availability — not provider quality
Informational, not a quality rating.
This page presents federal public records about Dr. Nathan from CMS (NPPES, Open Payments, Medicare Provider Utilization, PECOS). It is not medical advice, an endorsement, or a judgment of clinical quality. Always consult the provider directly and a licensed clinician for medical decisions. Read methodology →
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What this data tells you about Dr. Nathan
Dr. Manjari Nathan is a sleep medicine physician in Walnut Creek, CA, with 17 years of NPI registration. Based on federal Medicare data, Dr. Nathan performed 1,484 Medicare services across 1,007 unique beneficiaries.
Between the years covered by Open Payments, Dr. Nathan received a total of $6,226 from 38 pharmaceutical and/or device companies across 202 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common in sleep medicine (internal medicine) physician. Most payments are for meals and travel — low-value interactions common across virtually all practicing physicians. Patients may wish to discuss these relationships with their provider.
The Data Coverage level for Dr. Nathan is Very High — reflecting how much public federal data is available about this provider. Patients are encouraged to use this data as one of several factors when choosing a healthcare provider.
✓ 17 years in practice
▲ Top 27% volume in CA
$6,226 industry payments
Medicare Practice Summary
Medicare Utilization ↗1,484
Medicare services
Top 27% in CA for sleep medicine (internal medicine) physician
1,007
Unique beneficiaries
$110
Avg. Medicare payment
Medicare patients only (65+ / disabled) · How to read this →
~87 Medicare services per year of practice
Top procedures by volume
Ranked by number of services performed for Medicare patients. Avg. submitted charge is what the provider billed; avg. Medicare payment is what CMS paid.
| Procedure | Volume | Avg. paid | Avg. submitted |
|---|---|---|---|
| Critical care, first 30-74 min Emergency medical care for a critically ill or injured patient lasting between 30 and 74 minutes. This service involves direct patient care and medical decision making to stabilize the patient. |
285 | $190 | $970 |
| Hospital follow-up visit, high complexity Subsequent hospital inpatient or observation care for an existing patient involving high-level medical decision making, with at least 50 minutes total time on the date of the encounter. |
192 | $108 | $342 |
| Office visit, established patient, complex (40-54 min) An office or outpatient visit for an existing patient lasting between 40 and 54 minutes. This level of service is determined by the total time spent on the date of the encounter. |
168 | $166 | $635 |
| Office visit, established patient (30-39 min) A follow-up office visit for an existing patient lasting between 30 and 39 minutes. The visit involves medical evaluation and management of the patient's condition. |
121 | $107 | $460 |
| Pulmonary gas exchange test A test to examine how well the lungs exchange gases. |
102 | $8 | $131 |
| Lung volume test using sensors A test that measures the amount of air in the lungs using sensors. |
97 | $11 | $130 |
| Additional 30 minutes of critical care This code represents an additional 30 minutes of critical care services provided beyond the initial critical care time period. |
92 | $96 | $250 |
| Hospital follow-up visit, moderate complexity Follow-up hospital visit for an existing patient involving moderate medical decision making. The visit requires at least 35 minutes of time spent on the date of service. |
89 | $72 | $237 |
| Spirometry test before and after medication A test that measures the amount of air you can exhale and the speed of your breathing before and after taking a medication. |
75 | $9 | $240 |
| New patient office visit, complex (60-74 min) | 36 | $185 | $770 |
| Initial hospital admission, high complexity Initial hospital inpatient or observation care for a new patient involving high-level medical decision making, with at least 75 minutes total time on the date of the encounter. |
32 | $149 | $663 |
| Expiratory airflow and volume test A test that measures the amount of air you can exhale and the speed at which you can breathe it out. It evaluates lung function by assessing expiratory airflow and volume. |
30 | $7 | $135 |
| Prolonged office E/M service, first 15 minutes This code is used for additional time spent by a physician beyond the maximum required time of a primary office or outpatient evaluation and management service. It is billed in 15-minute increments based on total time spent on the date of the primary service. |
20 | $30 | $115 |
| Sleep study in sleep lab (age 6+) An overnight test conducted in a sleep laboratory to monitor sleep patterns and bodily functions in patients aged 6 years or older. |
19 | $643 | $2,275 |
| Sedation by physician, initial 15 minutes Administration of a drug to induce depression of consciousness by the physician performing a procedure. This code covers the initial 15 minutes of sedation for patients aged 5 years or older. |
16 | $11 | $194 |
| Ultrasound guidance for blood vessel access Use of ultrasound imaging to help locate and access a blood vessel. This guidance assists healthcare providers in performing procedures such as inserting IV lines or drawing blood. |
15 | $12 | $122 |
| Exercise-induced lung stress test A test performed to evaluate how the lungs function during physical exertion. It helps identify breathing difficulties or lung conditions that occur specifically when exercising. |
15 | $20 | $120 |
| Breathing device use evaluation An assessment of how a patient uses a breathing device. The provider reviews the patient's technique and device handling. |
15 | $18 | $65 |
| Chest fluid aspiration with imaging guidance This procedure involves removing fluid from the chest cavity using imaging technology to guide the needle placement. |
14 | $86 | $2,400 |
| Insertion of non-tunneled central venous catheter A procedure to place a central venous catheter for infusion in patients aged 5 years or older. The catheter is inserted directly into a large vein without being tunneled under the skin. |
14 | $73 | $788 |
| Office visit, established patient (20-29 min) An office visit for an existing patient lasting between 20 and 29 minutes. The visit involves medical evaluation and management of the patient's condition. |
13 | $70 | $325 |
| Hospital follow-up visit, low complexity Follow-up hospital visit for an established patient with straightforward or low-level medical decision making. The visit requires at least 25 minutes of time spent on the day of service. |
13 | $41 | $129 |
| Emergent tracheostomy An emergency procedure to create an opening in the windpipe to insert a breathing tube, guided by an endoscope. |
11 | $121 | $345 |
How to read this data: This reflects Medicare patients only (typically 65+). Payment amounts are what Medicare paid the provider, not your out-of-pocket cost. A higher procedure volume generally indicates more experience with that procedure.
0.9% high complexity
3.0% medium
96.1% routine
Industry Payment Transparency
Open Payments through 2024 ↗$6,226
Total received (2018-2024)
Avg $889/year across 7 years
Top 18% in CA for sleep medicine (internal medicine) physician
A higher payment rank reflects disclosed industry relationships (consulting, research, speaking) common among subspecialists — not wrongdoing.
38
Companies
202
Individual payments
All payments are legal and publicly reported · Not evidence of wrongdoing · How to interpret →
Payment profile
Industry payments classified by relationship type. Not all payments are equal — research and consulting reflect different relationships than speaking programs or meals.
Meals & Travel
Food, beverages, travel, and lodging — typically low-value
$4,183 (67.2%)
Consulting
Expert advisory fees, typically reflecting recognized clinical expertise
$1,868 (30.0%)
Speaking / Promotional
Speaker programs, honoraria, and industry-sponsored educational events
$175 (2.8%)
Payment trend by year
Annual totals from pharmaceutical and medical device companies.
2024
$936
2023
$724
2022
$1,163
2021
$572
2020
$236
2019
$2,176
2018
$419
Payments by company (2024)
Consulting
Speaking
Meals & Travel
Research
Boehringer Ingelheim Pharmaceuticals, Inc.
$224
AstraZeneca Pharmaceuticals LP
$178
HARMONY BIOSCIENCES LLC
$100
JAZZ PHARMACEUTICALS INC.
$88
La Jolla Pharmaceutical Company
$57
Fisher & Paykel Healthcare Inc
$51
Melinta Therapeutics, LLC
$43
Insmed, Inc.
$39
GENZYME CORPORATION
$38
Inspire Medical Systems, Inc.
$30
Avadel CNS Pharmaceuticals, LLC
$29
GlaxoSmithKline, LLC.
$24
Resmed Corp
$20
Janssen Pharmaceuticals, Inc
$16
Top 3 companies account for 53.7% of 2024 payments
All-time payments by company (2018-2024) ›
GENZYME CORPORATION
$2,133
Boehringer Ingelheim Pharmaceuticals, Inc.
$922
GlaxoSmithKline, LLC.
$484
AstraZeneca Pharmaceuticals LP
$463
Actelion Pharmaceuticals US, Inc.
$272
HARMONY BIOSCIENCES LLC
$147
Janssen Pharmaceuticals, Inc
$145
Genentech USA, Inc.
$143
JAZZ PHARMACEUTICALS INC.
$137
Takeda Pharmaceuticals U.S.A., Inc.
$129
Vanda Pharmaceuticals Inc.
$87
Ethicon Inc.
$85
Bayer HealthCare Pharmaceuticals Inc.
$81
Gilead Sciences, Inc.
$79
La Jolla Pharmaceutical Company
$77
Baxter Healthcare
$75
SANOFI-AVENTIS U.S. LLC
$75
Advanced Respiratory, Inc
$72
ABBVIE INC.
$60
Fisher & Paykel Healthcare Inc
$51
Amgen Inc.
$44
Melinta Therapeutics, LLC
$43
Resmed Corp
$42
Merck Sharp & Dohme Corporation
$41
Insmed, Inc.
$39
Circassia Pharmaceuticals Inc
$36
Philips Electronics North America Corporation
$33
ADVANCED RESPIRATORY, INC
$32
Harmony Biosciences LLC
$30
Inspire Medical Systems, Inc.
$30
Avadel CNS Pharmaceuticals, LLC
$29
EKOS Corporation
$22
Merck Sharp & Dohme LLC
$21
Apria Healthcare LLC
$18
Pulmonx Corporation
$17
Sunovion Pharmaceuticals Inc.
$14
Shire North American Group Inc
$11
Itamar Medical Inc
$8
Top 3 companies account for 56.9% of all-time payments
Associated products mentioned in payments ›
(8874) inCourage · AIRSENSE · AIRSUPRA · ANORO · ANORO ELLIPTA · AVYCAZ · Adempas · AirFit · Arikayce · BELSOMRA · BEVESPI AEROSPHERE · BREO · BREZTRI · CHARTIS CATHETER · DUPIXENT · EKOSONIC · Esbriet · FASENRA · FISHER & PAYKEL HEALTHCARE · GIAPREZA · GLASSIA · HETLIOZ · Hillrom - Life 2000 Ventilation System · Hillrom - Vest System Model 105 Home Care · INSPIRE · LONHALA MAGNAIR · LUMIZYME · LUMRYZ · Medela · Monarch Platform · NUCALA · OFEV · OPSUMIT · Rezzayo · SPIRIVA RESPIMAT · STIOLTO RESPIMAT · SYMBICORT · TEZSPIRE · TRELEGY ELLIPTA · TUDORZA PRESSAIR · The Vest System Model 105 Home Care · WAKIX · Wakix · WatchPATONE · XARELTO · XYWAV · Xolair · ZERBAXA
Should you be concerned? Payments from pharmaceutical and device companies are legal and common — 57% of U.S. physicians receive at least one. They often reflect legitimate consulting, research, or education. What matters is whether a recommended drug or device appears in your doctor's payment records. If so, consider asking your doctor about it. How to interpret this data →
Most payments (67%) are for meals and travel — low-value interactions that are common across virtually all practicing physicians.
Geographic Context
Sleep medicine physicians within 10 mi
12
Per 100K population
1.0
County median income
$125,727
Nearest hospital
JOHN MUIR MEDICAL CENTER - WALNUT CREEK CAMPUS
0.0 mi
0.0 mi
Data Sources
| Provider Registry | ✓ NPPES | Weekly updates |
| Medicare Enrollment | ✓ PECOS | Monthly updates |
| Practice Data | ✓ Medicare Util. | Annual (CY lag) |
| Industry Payments | ✓ Open Payments | CY 2024 |
| Disciplinary History | — Not public | N/A |
This provider has data in 4 of 4 available federal datasets, with a Data Coverage level of Very High. This reflects how much public data is available about a provider. How we calculate this →
Summary
Dr. Nathan is a clinical cardiology specialist, with above-average Medicare volume (top 27% in CA), with low-engagement industry engagement in the top 18% of CA peers, with 17 years of NPI registration.
This summary is auto-generated from federal data, describing data availability and patterns. Read our methodology →
Frequently Asked Questions
Is Dr. Nathan experienced with critical care, first 30-74 min?
Based on Medicare claims data, Dr. Nathan performed 285 critical care, first 30-74 min services. Research suggests that higher procedure volume is often associated with better outcomes, particularly for complex procedures. Note that Medicare data only captures patients aged 65 and older, so the total practice volume across all patients is likely higher.
Does Dr. Nathan receive payments from pharmaceutical companies?
Yes. Dr. Nathan received a total of $6,226 from 38 companies across 202 individual payments. These payments are legal, publicly disclosed under the federal Sunshine Act, and common among physicians — 57% of all U.S. physicians receive at least one industry payment. Patients may wish to ask their doctor about these relationships, especially if a recommended drug or device appears in the payment records.
How do Dr. Nathan's costs compare to other sleep medicine physicians in Walnut Creek?
Dr. Nathan's average Medicare payment per service is $110. Note that these figures represent what Medicare pays, not your out-of-pocket cost, which depends on your specific insurance plan and deductible. Procedure-level data above shows both what was submitted and what Medicare paid for each service type.
What does Data Coverage mean?
Data Coverage (currently Very High for Dr. Nathan) measures how much public federal data is available about a provider. It is not a quality rating. A "Very High" or "High" level means the provider has data across multiple federal sources (NPPES, PECOS, Medicare Utilization, Open Payments), indicating a long track record of practice, Medicare participation, and industry disclosure. A "Low" or "Moderate" level may simply mean the provider is newer, does not see Medicare patients, or has not received any industry payments — none of which are inherently negative. Read our full methodology →
Is this data up to date?
Each data source has its own update cycle. Provider registry data (NPPES) is updated weekly. Medicare enrollment (PECOS) is updated monthly. Medicare practice data has a ~2 year lag — the most recent available is typically 2 years prior. Industry payment data (Open Payments) is published annually, usually in June, covering the prior calendar year. We display the data date prominently on each section so you always know how current it is. See our data freshness policy →
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About this page
All data on this page is sourced verbatim from public federal records published by the U.S. Centers for Medicare & Medicaid Services (CMS): NPPES ↗, Open Payments ↗, Medicare Provider Utilization ↗, and PECOS. Publication is mandated by the Physician Payments Sunshine Act (§6002 ACA, 42 U.S.C. §1320a-7h) and the Freedom of Information Act.
This page is not medical advice, an endorsement, a recommendation, or a quality rating. Data Coverage reflects data completeness — how much federal information exists for this provider — not clinical performance, patient outcomes, or quality of care. Always verify information directly with the provider and consult a licensed clinician before making medical decisions.
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