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Edit this profileWhere to find Sadhis Rivas, MD
- Brewster location main office
111 Clock Tower Cmns, Brewster, NY 10509 - Mahopac location
888 Route 6, Mahopac, NY 10541 - Carmel location
667 Stoneleigh Ave Ste 117, Carmel, NY 10512 - Hopewell Junction location
129 Clove Branch Rd, Hopewell Junction, NY 12533 - Brooklyn location
260 Avenue X, Brooklyn, NY 11223
About Dr. Rivas
Sadhis Rivas, MD is a healthcare provider in Brewster, NY specializing in endocrinology, diabetes & metabolism. Medicare claims data shows Sadhis provided 1,865 services to 1,360 patients. The services billed most often include established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more, insertion of needle into vein for collection of blood sample, and blood test, thyroid stimulating hormone (tsh). This provider record is associated with NPI 1659445427.
Factual summary compiled by Guide.md from public records; not written by this provider.
Education & Training
Specialty
Credentials & Licensing
Medicare information
Exactly as CMS reports it (National Downloadable File, Opt-Out Affidavits, Order & Referring). Not an insurance directory; confirm coverage with the office.
Contact Information
- (845) 279-5187
- Email not available
Is this your home address or personal number? Hide it
Practice Locations
111 CLOCK TOWER CMNS
Brewster, NY 10509
888 Route 6
Mahopac, NY 10541
667 Stoneleigh Ave Ste 117
Carmel, NY 10512
129 Clove Branch Rd
Hopewell Junction, NY 12533
260 AVENUE X
Brooklyn, NY 11223
Conditions Commonly Evaluated or Treated
Within Endocrinology, Diabetes and Metabolism generally. Availability varies by clinician, training and location — this profile has not been claimed, so nothing here is a personal claim by the provider.
Conditions
Adrenal disorders
- Adrenal mass
- Cushing's Syndrome
- Adrenal Fatigue
- Adrenal gland tumor
Blood sugar disorders
- Low Blood Sugar
- Diabetic neuropathy
- Gestational diabetes
- Prediabetes
Bone and calcium disorders
- Low Calcium
- High calcium
- Vitamin D deficiency
Bones
- Soft Bones
Pituitary
- Acromegaly
- Adult Growth Hormone Deficiency
- Underactive Pituitary Gland
Pituitary disorders
- Extreme Thirst and Urination
- High Prolactin
- Pituitary Tumor
- Short stature and growth concerns
Thyroid
- Thyroiditis
Thyroid disorders
- Graves' Disease
- Goiter
- Hashimoto's Disease
- Thyroid cancer
- Thyroid eye disease
- Thyroid nodules
Most searched conditions
- Diabetes
- Hyperthyroidism
- Hypothyroidism
- Obesity
- Osteoporosis
- PCOS
- Thyroid problems
Adrenal
- Low sodium or electrolyte imbalance
Diabetes
- Dangerous high blood sugar
- Diabetic retinopathy
- Kidney disease from diabetes
Endocrine tumors
- Neuroendocrine Tumors
Hormone disorders
- Early or delayed puberty
- Excess facial or body hair
- Gynecomastia
- Perimenopause
- Testosterone deficiency
Hormones
- Absent periods
Metabolic disorders
Metabolism
- Fatty liver disease
- Insulin Resistance
- Unexplained Weight Gain
Parathyroid
- Hyperparathyroidism
Procedures & services
Adrenal
- 24-Hour Urine Cortisol Test
- Aldosterone and Renin Blood Test
- Urine Metanephrines Test
Adrenal evaluations
- Adrenal Gland Suppression Test
- Cortisol Testing
Blood sugar management
- Continuous Glucose Monitor Placement
- Diabetes Screening and A1C Test
- Glucose screening test
Bone evaluations
- Parathyroid Hormone Test
- Bone Density Scan Referral
Bone treatments
- Bisphosphonate Infusion for Bones
- Bone Building Injections
Diabetes
- Automated Insulin System Setup
- Blood Ketone Monitoring
- C-Peptide Test
- Continuous Glucose Monitor Data Review
- Starting Insulin Therapy
- Medical nutrition therapy
Diabetes education
- Diabetes Self-Management Education
Genetic evaluations
- Genetic Testing for Endocrine Tumors
Hormone treatments
- Growth Hormone Injections
- Hormone Replacement Therapy Consultation
- Estrogen and Progesterone Therapy
Hormones
- Gender-affirming care consultation
Metabolic evaluations
Metabolism
- Fasting Insulin Test
Parathyroid
- Parathyroid Scan
Pituitary
- Growth Hormone Stimulation Test
Pituitary evaluations
- Prolactin Blood Test
- Water Deprivation Test
Routine Blood Tests
Thyroid
- Thyroid Uptake and Scan
- Thyroid Cyst Alcohol Ablation
Thyroid procedures
- Thyroid Antibody Testing
- Thyroid Medication Adjustment
- Radioactive Iodine Treatment
- Thyroid Blood Test
- Thyroid Nodule Biopsy
- Thyroid Nodule Radiofrequency Ablation
Weight & Metabolism
Women's health
Most searched procedures
- Hormone replacement therapy
- Insulin pump management
- Thyroid ultrasound
- Weight loss management
Diabetes preventive care
- Diabetic Foot Care
Procedures Most Often Billed to Medicare
1,865 services · 1,360 patients · 22 distinct codes
| Procedure | Type | Code | Services | Compared with peers |
|---|---|---|---|---|
| Insertion of needle into vein for collection of blood sample | Procedure | 36415 |
312 | More often than most peers in Endocrinology, Diabetes &… |
| Established patient office or other outpatient visit with low level od decision making, if using time, 20 minutes or more | Office visit | 99213 |
312 | More than most peers in Endocrinology, Diabetes &… |
| Blood test, thyroid stimulating hormone (tsh) | Lab test | 84443 |
157 | As often as other peers in Endocrinology, Diabetes &… |
| Blood test, comprehensive group of blood chemicals | Lab test | 80053 |
141 | As often as other peers in Endocrinology, Diabetes &… |
| Hemoglobin a1c level | Lab test | 83036 |
109 | As often as other peers in Endocrinology, Diabetes &… |
| Vitamin d-3 level | Lab test | 82306 |
108 | As often as other peers in Endocrinology, Diabetes &… |
| Blood test, lipids (cholesterol and triglycerides) | Lab test | 80061 |
87 | As often as other peers in Endocrinology, Diabetes &… |
| Thyroxine (thyroid chemical), free | Lab test | 84439 |
79 | As often as other peers in Endocrinology, Diabetes &… |
| Telephone medical discussion with physician, 21-30 minutes | Office visit | 99443 |
72 | More often than most peers in Endocrinology, Diabetes &… |
| Blood glucose (sugar) test performed by hand-held instrument | Lab test | 82962 |
63 | As often as other peers in Endocrinology, Diabetes &… |
Source: CMS Medicare public data. Shows how often procedures were billed — not quality of care or patient satisfaction.
Related providers
Connections drawn from the registry and from what providers have told us. A link here is not a referral or an endorsement.
Related specialists at this location 1
Clinically related specialties at the same address — the people this provider most likely works alongside.
Also at this address 4
Providers at the same street address. Each files their own registry entry, so a shared practice often appears under several different names.
More connections — 24 related providers in 3 groups
Trained at Other 8
Other providers in the same specialty who trained at the same institution.
Class of 1981 at Other 8
Providers who graduated from the same medical school in the same year.
Also performs Insertion of needle into vein for collection of blood sample 8
Providers in NY who bill this service to Medicare most often.
Common questions
What kind of doctor is Dr. Rivas?
Dr. Rivas is an endocrinologist in Brewster, NY. That is the designation recorded for this NPI in the federal registry, where it is listed as “Endocrinology, Diabetes & Metabolism”.
NPI registry
What is Dr. Rivas's address?
Dr. Rivas is listed at 111 Clock Tower Cmns, Brewster, NY 10509. Addresses come from the NPI registry and can lag a move, so confirm before travelling.
NPI registry
How can I make an appointment with Dr. Rivas?
The number on file is (845) 279-5187. Contact the office directly to confirm availability and scheduling.
NPI registry
What is the NPI for Dr. Rivas?
Dr. Rivas's National Provider Identifier is 1659445427. It is issued by the Centers for Medicare & Medicaid Services and is unique and permanent — it does not change if they move practice.
NPI registry
Where did Dr. Rivas train?
Dr. Rivas attended Other, graduating in 1981. This comes from the CMS National Downloadable File.
CMS public data
How much experience does Dr. Rivas have?
Dr. Rivas has 45 years experience. Calculated from a graduation year of 1981, reported in the CMS National Downloadable File.
CMS public data
What procedures does Dr. Rivas perform?
According to Medicare billing data, Dr. Rivas performs procedures including insertion of needle into vein for collection of blood sample, alongside routine visits and testing. This reflects Medicare patients only and is billing volume, not a measure of quality.
Medicare claims
Is Dr. Rivas's profile verified?
Not yet. This profile is built from public federal data and has not been confirmed by Dr. Rivas. If this is you, claiming it is free.
Guide.md
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