Mark Sierra, MD
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- NPI Number
- 1639381593
- Provider Type
- Individual Practitioner
- Credential
- MD
- Primary Specialty
- Internal Medicine - Cardiovascular Disease
- License Number
- 4301086565
- Practice Address
- 2431 S. M-30
- City, State ZIP
- West Branch, MI 48661
- Phone
- (989) 343-3264
- Last Updated
- June 8, 2026
- Source
- Publicly available data
Mark Sierra, MD is a internal medicine - cardiovascular disease provider located in West Branch, MI. They offer internal medicine - cardiovascular disease services to patients in the West Branch area.
As a internal medicine - cardiovascular disease provider in West Branch, this clinician evaluates and treats patients for a range of common conditions seen in West Branch and throughout MI.
The practice is located at 2431 S. M-30, West Branch, MI 48661. Patients can call 9893433264 to schedule an appointment or use the directions link above to find the office from anywhere in the area.
Patients typically visit this provider for patients see internists for annual physicals, management of chronic conditions such as diabetes, hypertension, and heart disease, second opinions, and coordination of care between specialists.
If you plan to see this provider, it is a good idea to confirm that the practice accepts your insurance and is in-network before scheduling. Coverage details vary by plan, and our quote tool can help you compare options in MI.
This profile was last verified on June 8, 2026. Provider information is sourced from publicly available data and may not reflect recent changes. Please confirm details directly with the practice before scheduling.
Call for hours and appointments. Hours may vary by provider and location.
A patient’s guide to internal medicine - cardiovascular disease care in West Branch, MI.
What a Internal Medicine - Cardiovascular Disease provider does
Internal medicine providers, also called internists, specialize in the prevention, diagnosis, and treatment of diseases in adults. They are trained to handle both common and complex illnesses and often manage patients with multiple chronic conditions.
Common conditions treated
Internists commonly treat hypertension, type 2 diabetes, coronary artery disease, chronic obstructive pulmonary disease (COPD), thyroid disorders, kidney disease, and arthritis. They also coordinate cancer screenings and geriatric assessments.
Common reasons to schedule a visit
Patients see internists for annual physicals, management of chronic conditions such as diabetes, hypertension, and heart disease, second opinions, and coordination of care between specialists.
What to expect during a visit
Expect a thorough review of your medical history, current medications, and lifestyle. Your internist may order blood work, imaging, or other diagnostic tests to support an accurate diagnosis and treatment plan.
Insurance coverage considerations
Medicare and most commercial insurance plans cover adult preventive visits and chronic care management. Verify network status before scheduling by using our quote tool.
How to choose the right internal medicine - cardiovascular disease provider in West Branch
Choose an internist with experience managing your specific conditions, convenient hospital affiliations, and a willingness to coordinate with any specialists you may need. Board certification in internal medicine signals additional training and commitment to ongoing education.
Looking for in-network coverage that includes this internal medicine - cardiovascular disease provider? Compare health plans in MI →
Insurance acceptance not listed
The public NPI registry does not include insurance acceptance data. Contact the office directly to ask if they accept your insurance plan. You can also use our quote tool to find health plans in MI.
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Common questions about Mark Sierra, MD in West Branch, MI.
How do I make an appointment with Mark Sierra, MD?
Call Mark Sierra, MD directly at their West Branch office to schedule a visit. You can also use the contact form on this page to send a message and the practice will respond.
Does Mark Sierra, MD accept insurance?
Provider insurance information is not included in the public NPI registry data that powers this directory. Contact the office directly to ask whether they accept your specific insurance plan. You can also use our quote tool to find health plans in MI.
What are the office hours for Mark Sierra, MD in West Branch?
Office hours for Mark Sierra, MD in West Branch are not currently published. Call the practice directly to confirm hours before your visit.
Is parking available at Mark Sierra, MD's West Branch location?
Most provider offices in West Branch offer on-site or nearby street parking. Call Mark Sierra, MD in West Branch ahead of time to confirm parking options and accessibility accommodations.
Does Mark Sierra, MD offer telehealth?
Many internal medicine - cardiovascular disease providers in MI now offer telehealth visits for follow-ups, medication management, and routine consultations. Call Mark Sierra, MD to ask whether a telehealth visit is appropriate for your needs.
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Claim ProfileData is sourced from publicly available records. Public records do not confirm active license status, quality of care, insurance acceptance, or network participation. Please verify details directly with the provider before scheduling. Last updated June 8, 2026.